rubocop: fix various Rubocop warnings.

.rubocop.yml

@@ -18,6 +18,9 @@ Layout/CaseIndentation:
 Layout/EmptyLineAfterGuardClause:
   Enabled: false
 
+Layout/EmptyLineBetweenDefs:
+  AllowAdjacentOneLineDefs: true
+
 Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 
@@ -44,7 +47,7 @@ Metrics/AbcSize:
 
 Metrics/BlockLength:
   Max: 50
-  ExcludedMethods:
+  IgnoredMethods:
     - concerning
     - context
     - should
@@ -66,7 +69,7 @@ Metrics/ModuleLength:
   Max: 500
 
 Metrics/ParameterLists:
-  Max: 4
+  Max: 6
 
 Metrics/PerceivedComplexity:
   Max: 20
@@ -74,18 +77,43 @@ Metrics/PerceivedComplexity:
 Lint/InheritException:
   EnforcedStyle: standard_error
 
+Naming/HeredocDelimiterNaming:
+  Enabled: false
+
 Naming/MethodParameterName:
   Enabled: false
 
+Naming/PredicateName:
+  Enabled: false
+
+Rails/Blank:
+  UnlessPresent: false
+
+Rails/DynamicFindBy:
+  Enabled: false
+
+Rails/HasManyOrHasOneDependent:
+  Enabled: false
+
 Rails/HttpStatus:
   EnforcedStyle: numeric
 
+Rails/InverseOf:
+  Enabled: false
+
+Style/Alias:
+  EnforcedStyle: prefer_alias_method
+
 Style/AsciiComments:
   Enabled: false
 
 Style/CommentAnnotation:
   Enabled: false
 
+Style/ConditionalAssignment:
+  EnforcedStyle: assign_inside_condition
+  IncludeTernaryExpressions: false
+
 Style/Documentation:
   Enabled: false
 
@@ -104,6 +132,9 @@ Style/FloatDivision:
 Style/FrozenStringLiteralComment:
   Enabled: false
 
+Style/GuardClause:
+  MinBodyLength: 20
+
 Style/HashSyntax:
   Enabled: false
 
@@ -113,12 +144,20 @@ Style/IfUnlessModifier:
 Style/MutableConstant:
   Enabled: false
 
+Style/NegatedIf:
+  Enabled: false
+
 Style/NumericPredicate:
   Enabled: false
 
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
-    "default": "[]"
+    "default": "{}"
+    "%i": "[]"
+    "%I": "[]"
+    "%w": "[]"
+    "%W": "[]"
+    "%r": "{}"
 
 Style/ParallelAssignment:
   Enabled: false
@@ -134,7 +173,7 @@ Style/SpecialGlobalVars:
   Enabled: false
 
 Style/StringLiterals:
-  Enabled: false
+  EnforcedStyle: double_quotes
 
 Style/StringLiteralsInInterpolation:
   Enabled: false
@@ -142,8 +181,18 @@ Style/StringLiteralsInInterpolation:
 Style/SymbolArray:
   MinSize: 10
 
+Style/SymbolProc:
+  IgnoredMethods:
+    - respond_with
+
 Style/TernaryParentheses:
   EnforcedStyle: require_parentheses_when_complex
 
+Style/TrailingCommaInArrayLiteral:
+  EnforcedStyleForMultiline: consistent_comma
+
+Style/TrailingCommaInHashLiteral:
+  EnforcedStyleForMultiline: consistent_comma
+
 Style/WordArray:
   MinSize: 10

app/components/application_component.rb

@@ -1,7 +1,6 @@
 class ApplicationComponent < ViewComponent::Base
   delegate :link_to_user, :time_ago_in_words_tagged, :format_text, :external_link_to, :tag_class, to: :helpers
-  delegate :edit_icon, :delete_icon, :undelete_icon, :flag_icon, :upvote_icon,
-    :downvote_icon, :link_icon, :sticky_icon, :unsticky_icon, to: :helpers
+  delegate :edit_icon, :delete_icon, :undelete_icon, :flag_icon, :upvote_icon, :downvote_icon, :link_icon, :sticky_icon, :unsticky_icon, to: :helpers
 
   def policy(subject)
     Pundit.policy!(current_user, subject)

app/components/comment_component.rb

@@ -4,6 +4,7 @@ class CommentComponent < ApplicationComponent
   attr_reader :comment, :context, :dtext_data, :current_user
 
   def initialize(comment:, current_user:, context: nil, dtext_data: nil)
+    super
     @comment = comment
     @context = context
     @dtext_data = dtext_data
@@ -11,7 +12,7 @@ class CommentComponent < ApplicationComponent
   end
 
   def dimmed?
-    comment.is_deleted? || (!comment.is_sticky? && comment.score <= current_user.comment_threshold/2.0)
+    comment.is_deleted? || (!comment.is_sticky? && comment.score <= current_user.comment_threshold / 2.0)
   end
 
   def thresholded?

app/components/comment_section_component.rb

@@ -4,6 +4,7 @@ class CommentSectionComponent < ApplicationComponent
   attr_reader :post, :comments, :current_user, :limit, :dtext_data
 
   def initialize(post:, current_user:, limit: nil)
+    super
     @post = post
     @current_user = current_user
     @limit = limit

app/components/forum_post_component.rb

@@ -2,6 +2,7 @@
 
 class ForumPostComponent < ApplicationComponent
   attr_reader :forum_post, :original_forum_post_id, :dtext_data, :moderation_reports, :current_user
+
   delegate :link_to_user, :time_ago_in_words_tagged, :format_text, :policy, to: :helpers
 
   with_collection_parameter :forum_post
@@ -17,6 +18,7 @@ class ForumPostComponent < ApplicationComponent
   end
 
   def initialize(forum_post:, original_forum_post_id: nil, dtext_data: nil, current_user: User.anonymous)
+    super
     @forum_post = forum_post
     @original_forum_post_id = original_forum_post_id
     @dtext_data = dtext_data

app/components/forum_post_component/forum_post_component.html.erb

@@ -23,6 +23,7 @@
       <% if policy(forum_post).create? %>
         <li><%= link_to "Reply", new_forum_post_path(post_id: forum_post.id), method: :get, remote: true %></li>
       <% end %>
+
       <% if policy(forum_post).destroy? && !forum_post.is_original_post?(original_forum_post_id) %>
         <% if forum_post.is_deleted %>
           <li><%= link_to "Undelete", undelete_forum_post_path(forum_post.id), method: :post, remote: true %></li>
@@ -30,6 +31,7 @@
           <li><%= link_to "Delete", forum_post_path(forum_post.id), "data-confirm": "Are you sure you want to delete this forum post?", method: :delete, remote: true %></li>
         <% end %>
       <% end %>
+
       <% if policy(forum_post).update? %>
         <% if forum_post.is_original_post?(original_forum_post_id) %>
           <li><%= link_to "Edit", edit_forum_topic_path(forum_post.topic), id: "edit_forum_topic_link_#{forum_post.topic.id}", class: "edit_forum_topic_link" %></li>
@@ -37,12 +39,15 @@
           <li><%= link_to "Edit", edit_forum_post_path(forum_post.id), id: "edit_forum_post_link_#{forum_post.id}", class: "edit_forum_post_link" %></li>
         <% end %>
       <% end %>
+
       <% if policy(forum_post).reportable? %>
         <li><%= link_to "Report", new_moderation_report_path(moderation_report: { model_type: "ForumPost", model_id: forum_post.id }), remote: true, title: "Report this forum post to the moderators" %></li>
       <% end %>
+
       <% if has_moderation_reports? %>
         <li class="moderation-report-notice">Reported (<%= link_to pluralize(forum_post.moderation_reports.length, "report"), moderation_reports_path(search: { model_type: "ForumPost", model_id: forum_post.id }) %>)</li>
       <% end %>
+
       <% if forum_post.bulk_update_request.present? %>
         <menu class="votes" id="forum-post-votes-for-<%= forum_post.id %>">
           <%= render "forum_post_votes/list", votes: forum_post.votes, forum_post: forum_post %>

app/components/paginator_component.rb

@@ -2,10 +2,12 @@
 
 class PaginatorComponent < ApplicationComponent
   attr_reader :records, :window, :params
+
   delegate :current_page, :prev_page, :next_page, :total_pages, :paginator_mode, :paginator_page_limit, to: :records
   delegate :ellipsis_icon, :chevron_left_icon, :chevron_right_icon, to: :helpers
 
   def initialize(records:, params:, window: 4)
+    super
     @records = records
     @window = window
     @params = params
@@ -25,7 +27,7 @@ class PaginatorComponent < ApplicationComponent
       ("..." unless left == 2),
       (left..right).to_a,
       ("..." unless right == last_page - 1),
-      (last_page unless last_page == 1)
+      (last_page unless last_page == 1),
     ].flatten.compact
   end
 

app/components/post_navbar_component.rb

@@ -4,6 +4,7 @@ class PostNavbarComponent < ApplicationComponent
   attr_reader :post, :current_user, :search
 
   def initialize(post:, current_user:, search: nil)
+    super
     @post = post
     @current_user = current_user
     @search = search.presence || "status:any"

app/components/post_preview_component.rb

@@ -4,9 +4,11 @@ class PostPreviewComponent < ApplicationComponent
   with_collection_parameter :post
 
   attr_reader :post, :tags, :show_deleted, :show_cropped, :link_target, :pool, :similarity, :recommended, :compact, :size, :current_user, :options
+
   delegate :external_link_to, :time_ago_in_words_tagged, :empty_heart_icon, to: :helpers
 
   def initialize(post:, tags: "", show_deleted: false, show_cropped: true, link_target: post, pool: nil, similarity: nil, recommended: nil, compact: nil, size: nil, current_user: CurrentUser.user, **options)
+    super
     @post = post
     @tags = tags.presence
     @show_deleted = show_deleted
@@ -44,7 +46,7 @@ class PostPreviewComponent < ApplicationComponent
 
       {
         width: [(downscale_ratio * post.image_width).floor, post.image_width].min,
-        height: [(downscale_ratio * post.image_height).floor, post.image_height].min
+        height: [(downscale_ratio * post.image_height).floor, post.image_height].min,
       }
     else
       { width: 0, height: 0 }
@@ -70,7 +72,7 @@ class PostPreviewComponent < ApplicationComponent
   def data_attributes
     attributes = {
       "data-id" => post.id,
-      "data-has-sound" => post.has_tag?('video_with_sound|flash_with_sound'),
+      "data-has-sound" => post.has_tag?("video_with_sound|flash_with_sound"),
       "data-tags" => post.tag_string,
       "data-pools" => post.pool_string,
       "data-approver-id" => post.approver_id,

app/components/post_votes_component.rb

@@ -5,6 +5,7 @@ class PostVotesComponent < ApplicationComponent
   attr_reader :post, :current_user
 
   def initialize(post:, current_user:)
+    super
     @post = post
     @current_user = current_user
   end

app/components/source_data_component.rb

@@ -2,9 +2,11 @@
 
 class SourceDataComponent < ApplicationComponent
   attr_reader :source
+
   delegate :spinner_icon, :external_site_icon, to: :helpers
 
   def initialize(source:)
+    super
     @source = source
   end
 

app/components/tag_list_component.rb

@@ -2,16 +2,18 @@
 
 class TagListComponent < ApplicationComponent
   attr_reader :tags, :current_query, :show_extra_links
+
   delegate :humanized_number, to: :helpers
 
   def initialize(tags: [], current_query: nil, show_extra_links: false)
+    super
     @tags = tags
     @current_query = current_query
     @show_extra_links = show_extra_links
   end
 
   def self.tags_from_names(tag_names)
-    names_to_tags = Tag.where(name: tag_names).map { |tag| [tag.name, tag] }.to_h
+    names_to_tags = Tag.where(name: tag_names).index_by(&:name)
 
     tag_names.map do |name|
       names_to_tags.fetch(name) { Tag.new(name: name).freeze }

app/controllers/application_controller.rb

@@ -90,9 +90,9 @@ class ApplicationController < ActionController::Base
       render_error_page(401, exception, template: "sessions/new")
     when ActionController::InvalidAuthenticityToken, ActionController::UnpermittedParameters, ActionController::InvalidCrossOriginRequest
       render_error_page(403, exception)
-    when ActiveSupport::MessageVerifier::InvalidSignature # raised by `find_signed!`
-      render_error_page(403, exception, template: "static/access_denied", message: "Access denied")
-    when User::PrivilegeError, Pundit::NotAuthorizedError
+    when ActiveSupport::MessageVerifier::InvalidSignature, # raised by `find_signed!`
+         User::PrivilegeError,
+         Pundit::NotAuthorizedError
       render_error_page(403, exception, template: "static/access_denied", message: "Access denied")
     when ActiveRecord::RecordNotFound
       render_error_page(404, exception, message: "That record was not found.")
@@ -183,7 +183,7 @@ class ApplicationController < ActionController::Base
     return if CurrentUser.user.is_anonymous?
 
     last_authenticated_at = session[:last_authenticated_at]
-    if last_authenticated_at.blank? || Time.parse(last_authenticated_at) < 60.minutes.ago
+    if last_authenticated_at.blank? || Time.zone.parse(last_authenticated_at) < 60.minutes.ago
       redirect_to confirm_password_session_path(url: request.fullpath)
     end
   end
@@ -197,7 +197,7 @@ class ApplicationController < ActionController::Base
     params[:search] ||= ActionController::Parameters.new
 
     deep_reject_blank = lambda do |hash|
-      hash.reject { |k, v| v.blank? || (v.is_a?(Hash) && deep_reject_blank.call(v).blank?) }
+      hash.reject { |_k, v| v.blank? || (v.is_a?(Hash) && deep_reject_blank.call(v).blank?) }
     end
     nonblank_search_params = deep_reject_blank.call(params[:search])
 

app/controllers/artists_controller.rb

@@ -56,7 +56,7 @@ class ArtistsController < ApplicationController
 
   def destroy
     @artist = authorize Artist.find(params[:id])
-    @artist.update_attribute(:is_deleted, true)
+    @artist.update(is_deleted: true)
     redirect_to(artist_path(@artist), :notice => "Artist deleted")
   end
 

app/controllers/comment_votes_controller.rb

@@ -3,7 +3,7 @@ class CommentVotesController < ApplicationController
 
   def index
     @comment_votes = authorize CommentVote.visible(CurrentUser.user).paginated_search(params, count_pages: true)
-    @comment_votes = @comment_votes.includes(:user, comment: [:creator, post: [:uploader]]) if request.format.html?
+    @comment_votes = @comment_votes.includes(:user, comment: [:creator, { post: [:uploader] }]) if request.format.html?
 
     respond_with(@comment_votes)
   end

app/controllers/comments_controller.rb

@@ -82,7 +82,7 @@ class CommentsController < ApplicationController
 
   def index_by_post
     @limit = params.fetch(:limit, 20)
-    @posts = Post.where("last_comment_bumped_at IS NOT NULL").user_tag_match(params[:tags]).reorder("last_comment_bumped_at DESC NULLS LAST").paginate(params[:page], limit: @limit, search_count: params[:search])
+    @posts = Post.where.not(last_comment_bumped_at: nil).user_tag_match(params[:tags]).reorder("last_comment_bumped_at DESC NULLS LAST").paginate(params[:page], limit: @limit, search_count: params[:search])
 
     if request.format.html?
       @posts = @posts.includes(comments: [:creator])

app/controllers/delayed_jobs_controller.rb

@@ -8,33 +8,25 @@ class DelayedJobsController < ApplicationController
 
   def cancel
     @job = authorize Delayed::Job.find(params[:id]), policy_class: DelayedJobPolicy
-    if !@job.locked_at?
-      @job.fail!
-    end
+    @job.fail! unless @job.locked_at?
     respond_with(@job)
   end
 
   def retry
     @job = authorize Delayed::Job.find(params[:id]), policy_class: DelayedJobPolicy
-    if !@job.locked_at?
-      @job.update(failed_at: nil, attempts: 0)
-    end
+    @job.update(failed_at: nil, attempts: 0) unless @job.locked_at?
     respond_with(@job)
   end
 
   def run
     @job = authorize Delayed::Job.find(params[:id]), policy_class: DelayedJobPolicy
-    if !@job.locked_at?
-      @job.update(run_at: Time.now)
-    end
+    @job.update(run_at: Time.zone.now) unless @job.locked_at?
     respond_with(@job)
   end
 
   def destroy
     @job = authorize Delayed::Job.find(params[:id]), policy_class: DelayedJobPolicy
-    if !@job.locked_at?
-      @job.destroy
-    end
+    @job.destroy unless @job.locked_at?
     respond_with(@job)
   end
 end

app/controllers/dtext_previews_controller.rb

@@ -2,7 +2,8 @@ class DtextPreviewsController < ApplicationController
   def create
     @inline = params[:inline].to_s.truthy?
     @disable_mentions = params[:disable_mentions].to_s.truthy?
+    @html = helpers.format_text(params[:body], inline: @inline, disable_mentions: @disable_mentions)
 
-    render inline: "<%= format_text(params[:body], inline: @inline, disable_mentions: @disable_mentions) %>"
+    render html: @html
   end
 end

app/controllers/forum_topics_controller.rb

@@ -79,7 +79,7 @@ class ForumTopicsController < ApplicationController
 
   def mark_all_as_read
     authorize ForumTopic
-    CurrentUser.user.update_attribute(:last_forum_read_at, Time.now)
+    CurrentUser.user.update(last_forum_read_at: Time.zone.now)
     ForumTopicVisit.prune!(CurrentUser.user)
     redirect_to forum_topics_path, :notice => "All topics marked as read"
   end

app/controllers/ip_addresses_controller.rb

@@ -4,9 +4,10 @@ class IpAddressesController < ApplicationController
   def index
     @ip_addresses = authorize IpAddress.visible(CurrentUser.user).paginated_search(params)
 
-    if search_params[:group_by] == "ip_addr"
+    case search_params[:group_by]
+    when "ip_addr"
       @ip_addresses = @ip_addresses.group_by_ip_addr(search_params[:ipv4_masklen], search_params[:ipv6_masklen])
-    elsif search_params[:group_by] == "user"
+    when "user"
       @ip_addresses = @ip_addresses.group_by_user.includes(:user)
     else
       @ip_addresses = @ip_addresses.includes(:user, :model)

app/controllers/maintenance/user/email_notifications_controller.rb

@@ -4,7 +4,7 @@ module Maintenance
       class VerificationError < StandardError; end
 
       before_action :validate_sig, :only => [:destroy]
-      rescue_from VerificationError, :with => :render_403
+      rescue_from VerificationError, with: :render_verification_error
 
       def show
       end
@@ -17,15 +17,15 @@ module Maintenance
 
       private
 
-      def render_403
-        render plain: "", :status => 403
+      def render_verification_error
+        render plain: "", status: 403
       end
 
       def validate_sig
         verifier = ActiveSupport::MessageVerifier.new(Danbooru.config.email_key, digest: "SHA256", serializer: JSON)
         calculated_sig = verifier.generate(params[:user_id].to_s)
         if calculated_sig != params[:sig]
-          raise VerificationError.new
+          raise VerificationError, "Invalid signature"
         end
       end
     end

app/controllers/pool_versions_controller.rb

@@ -35,8 +35,6 @@ class PoolVersionsController < ApplicationController
   end
 
   def check_availabililty
-    if !PoolVersion.enabled?
-      raise NotImplementedError.new("Archive service is not configured. Pool versions are not saved.")
-    end
+    raise NotImplementedError, "Archive service is not configured. Pool versions are not saved." unless PoolVersion.enabled?
   end
 end

app/controllers/pools_controller.rb

@@ -54,7 +54,7 @@ class PoolsController < ApplicationController
 
   def destroy
     @pool = authorize Pool.find(params[:id])
-    @pool.update_attribute(:is_deleted, true)
+    @pool.update(is_deleted: true)
     @pool.create_mod_action_for_delete
     flash[:notice] = "Pool deleted"
     respond_with(@pool)
@@ -62,7 +62,7 @@ class PoolsController < ApplicationController
 
   def undelete
     @pool = authorize Pool.find(params[:id])
-    @pool.update_attribute(:is_deleted, false)
+    @pool.update(is_deleted: false)
     @pool.create_mod_action_for_undelete
     flash[:notice] = "Pool undeleted"
     respond_with(@pool)

app/controllers/post_versions_controller.rb

@@ -37,8 +37,7 @@ class PostVersionsController < ApplicationController
   end
 
   def check_availabililty
-    if !PostVersion.enabled?
-      raise NotImplementedError.new("Archive service is not configured. Post versions are not saved.")
-    end
+    return if PostVersion.enabled?
+    raise NotImplementedError, "Archive service is not configured. Post versions are not saved."
   end
 end

app/controllers/posts_controller.rb

@@ -116,7 +116,7 @@ class PostsController < ApplicationController
           render :template => "static/error", :status => 500
         else
           response_params = {:q => params[:tags_query], :pool_id => params[:pool_id], :favgroup_id => params[:favgroup_id]}
-          response_params.reject! {|key, value| value.blank?}
+          response_params.reject! {|_key, value| value.blank?}
           redirect_to post_path(post, response_params)
         end
       end

app/controllers/recommended_posts_controller.rb

@@ -4,7 +4,7 @@ class RecommendedPostsController < ApplicationController
   def index
     limit = params.fetch(:limit, 100).to_i.clamp(0, 200)
     @recs = RecommenderService.search(search_params).take(limit)
-    @posts = @recs.map { |rec| rec[:post] }
+    @posts = @recs.pluck(:post)
 
     respond_with(@recs)
   end

app/controllers/static_controller.rb

@@ -33,7 +33,7 @@ class StaticController < ApplicationController
 
   def sitemap_index
     @sitemap = params[:sitemap]
-    @limit = params.fetch(:limit, 10000).to_i
+    @limit = params.fetch(:limit, 10_000).to_i
 
     case @sitemap
     when "artists"

app/controllers/uploads_controller.rb

@@ -45,7 +45,7 @@ class UploadsController < ApplicationController
   def preprocess
     authorize Upload
     @upload, @remote_size = UploadService::ControllerHelper.prepare(
-      url: params.dig(:upload, :source), file: params.dig(:upload, :file), ref: params.dig(:upload, :referer_url),
+      url: params.dig(:upload, :source), file: params.dig(:upload, :file), ref: params.dig(:upload, :referer_url)
     )
     render body: nil
   end

app/helpers/application_helper.rb

@@ -1,5 +1,3 @@
-require 'dtext'
-
 module ApplicationHelper
   def listing_type(*fields, member_check: true, types: [:revert, :standard])
     (fields.reduce(false) { |acc, field| acc || params.dig(:search, field).present? } && (!member_check || CurrentUser.is_member?) ? types[0] : types[1])
@@ -11,8 +9,7 @@ module ApplicationHelper
   end
 
   def diff_name_html(this_name, other_name)
-    pattern = Regexp.new('.')
-    DiffBuilder.new(this_name, other_name, pattern).build
+    DiffBuilder.new(this_name, other_name, /./).build
   end
 
   def diff_body_html(record, other, field)
@@ -21,7 +18,7 @@ module ApplicationHelper
       return h(diff_record[field]).gsub(/\r?\n/, '<span class="paragraph-mark">¶</span><br>').html_safe
     end
 
-    pattern = Regexp.new('(?:<.+?>)|(?:\w+)|(?:[ \t]+)|(?:\r?\n)|(?:.+?)')
+    pattern = /(?:<.+?>)|(?:\w+)|(?:[ \t]+)|(?:\r?\n)|(?:.+?)/
     DiffBuilder.new(record[field], other[field], pattern).build
   end
 
@@ -32,18 +29,17 @@ module ApplicationHelper
       return type == "previous" ? "New" : ""
     end
 
-    statuses = []
-    record.class.status_fields.each do |field, status|
-      if record.has_attribute?(field)
-        statuses += [status] if record[field] != other[field]
-      else
-        statuses += [status] if record.send(field, type)
-      end
+    changed_fields = record.class.status_fields.select do |field, status|
+      (record.has_attribute?(field) && record[field] != other[field]) ||
+      (!record.has_attribute?(field) && record.send(field, type))
     end
 
+    statuses = changed_fields.map { |field, status| status }
     altered = record.updater_id != other.updater_id
 
-    %(<div class="version-statuses" data-altered="#{altered}">#{statuses.join("<br>")}</div>).html_safe
+    tag.div(class: "version-statuses", "data-altered": altered) do
+      safe_join(statuses, tag.br)
+    end
   end
 
   def wordbreakify(string)

app/helpers/forum_topics_helper.rb

@@ -4,7 +4,7 @@ module ForumTopicsHelper
   end
 
   def available_min_user_levels
-    ForumTopic::MIN_LEVELS.select { |name, level| level <= CurrentUser.level }.to_a
+    ForumTopic::MIN_LEVELS.select { |_name, level| level <= CurrentUser.level }.to_a
   end
 
   def new_forum_topic?(topic, read_forum_topics)

app/helpers/popular_posts_helper.rb

@@ -22,11 +22,12 @@ module PopularPostsHelper
   end
 
   def date_range_description(date, scale, min_date, max_date)
-    if scale == "day"
+    case scale
+    when "day"
       date.strftime("%B %d, %Y")
-    elsif scale == "week"
+    when "week"
       "#{min_date.strftime("%B %d, %Y")} - #{max_date.strftime("%B %d, %Y")}"
-    elsif scale == "month"
+    when "month"
       date.strftime("%B %Y")
     end
   end

app/helpers/post_versions_helper.rb

@@ -40,12 +40,12 @@ module PostVersionsHelper
   def post_version_field(post_version, field)
     value = post_version_value(post_version.send(field))
     prefix = (field == :parent_id ? "parent" : field.to_s)
-    search = prefix + ":" + value.to_s
+    search = "#{prefix}:#{value}"
     display = (field == :rating ? post_version.pretty_rating : value)
     %(<b>#{field.to_s.titleize}:</b> #{link_to(display, posts_path(:tags => search))}).html_safe
   end
 
   def post_version_value(value)
-    return (value.present? ? value : "none")
+    value.presence || "none"
   end
 end

app/helpers/wiki_pages_helper.rb

@@ -1,6 +1,9 @@
 module WikiPagesHelper
   def wiki_page_other_names_list(wiki_page)
-    names_html = wiki_page.other_names.map {|name| link_to(name, "http://www.pixiv.net/search.php?s_mode=s_tag_full&word=#{u(name)}", :class => "wiki-other-name")}
-    names_html.join(" ").html_safe
+    names_html = wiki_page.other_names.map do |name|
+      link_to(name, "https://www.pixiv.net/tags/#{u(name)}/artworks", class: "wiki-other-name")
+    end
+
+    safe_join(names_html, " ")
   end
 end

app/jobs/application_job.rb

@@ -2,7 +2,7 @@ class ApplicationJob < ActiveJob::Base
   queue_as :default
   queue_with_priority 0
 
-  discard_on ActiveJob::DeserializationError do |job, error|
+  discard_on ActiveJob::DeserializationError do |_job, error|
     DanbooruLogger.log(error)
   end
 end

app/logical/moderator/dashboard/queries/artist.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class Artist < ::Struct.new(:user, :count)
         def self.all(min_date, max_level)
-          ::ArtistVersion.joins(:updater)
+          ::ArtistVersion
+            .joins(:updater)
             .where("artist_versions.created_at > ?", min_date)
             .where("users.level <= ?", max_level)
             .group(:updater)

app/logical/moderator/dashboard/queries/comment.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class Comment < ::Struct.new(:comment, :count)
         def self.all(min_date, max_level)
-          ::CommentVote.joins(comment: [:creator])
+          ::CommentVote
+            .joins(comment: [:creator])
             .where("comments.score < 0")
             .where("comment_votes.created_at > ?", min_date)
             .where("users.level <= ?", max_level)

app/logical/moderator/dashboard/queries/note.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class Note < ::Struct.new(:user, :count)
         def self.all(min_date, max_level)
-          ::NoteVersion.joins(:updater)
+          ::NoteVersion
+            .joins(:updater)
             .where("note_versions.created_at > ?", min_date)
             .where("users.level <= ?", max_level)
             .group(:updater)

app/logical/moderator/dashboard/queries/post_appeal.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class PostAppeal
         def self.all(min_date)
-          ::Post.joins(:appeals).includes(:uploader, :flags, appeals: [:creator])
+          ::Post
+            .joins(:appeals).includes(:uploader, :flags, appeals: [:creator])
             .deleted
             .where("post_appeals.created_at > ?", min_date)
             .group(:id)

app/logical/moderator/dashboard/queries/upload.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class Upload < ::Struct.new(:user, :count)
         def self.all(min_date, max_level)
-          ::Post.joins(:uploader)
+          ::Post
+            .joins(:uploader)
             .where("posts.created_at > ?", min_date)
             .where("users.level <= ?", max_level)
             .group(:uploader)

app/logical/moderator/dashboard/queries/wiki_page.rb

@@ -3,7 +3,8 @@ module Moderator
     module Queries
       class WikiPage < ::Struct.new(:user, :count)
         def self.all(min_date, max_level)
-          ::WikiPageVersion.joins(:updater)
+          ::WikiPageVersion
+            .joins(:updater)
             .where("wiki_page_versions.created_at > ?", min_date)
             .where("users.level <= ?", max_level)
             .group(:updater)

app/logical/moderator/ip_addr_search.rb

@@ -62,7 +62,7 @@ module Moderator
     end
 
     def add_row(sums, counts)
-      sums.merge!(counts) { |key, oldcount, newcount| oldcount + newcount }
+      sums.merge!(counts) { |_key, oldcount, newcount| oldcount + newcount }
     end
 
     def add_row_id(sums, counts)

app/logical/nico_seiga_api_client.rb

@@ -11,9 +11,10 @@ class NicoSeigaApiClient
   end
 
   def image_ids
-    if @work_type == "illust"
+    case @work_type
+    when "illust"
       [api_response["id"]]
-    elsif @work_type == "manga"
+    when "manga"
       manga_api_response.map do |x|
         case x["meta"]["source_url"]
         when %r{/thumb/(\d+)\w}i then Regexp.last_match(1)
@@ -40,20 +41,22 @@ class NicoSeigaApiClient
   end
 
   def user_name
-    if @work_type == "illust"
+    case @work_type
+    when "illust"
       api_response["nickname"]
-    elsif @work_type == "manga"
+    when "manga"
       user_api_response(user_id)["nickname"]
     end
   end
 
   def api_response
-    if @work_type == "illust"
+    case @work_type
+    when "illust"
       resp = get("https://sp.seiga.nicovideo.jp/ajax/seiga/im#{@work_id}")
       return {} if resp.blank? || resp.code.to_i == 404
       api_response = JSON.parse(resp)["target_image"]
 
-    elsif @work_type == "manga"
+    when "manga"
       resp = http.cache(1.minute).get("#{XML_API}/theme/info?id=#{@work_id}")
       return {} if resp.blank? || resp.code.to_i == 404
       api_response = Hash.from_xml(resp.to_s)["response"]["theme"]
@@ -86,16 +89,13 @@ class NicoSeigaApiClient
 
     # XXX should fail gracefully instead of raising exception
     resp = http.cache(1.hour).post("https://account.nicovideo.jp/login/redirector?site=seiga", form: form)
-    raise RuntimeError, "NicoSeiga login failed (status=#{resp.status} url=#{url})" if resp.status != 200
+    raise "NicoSeiga login failed (status=#{resp.status} url=#{url})" if resp.status != 200
 
     http
   end
 
   def get(url)
-    resp = login.cache(1.minute).get(url)
-    #raise RuntimeError, "NicoSeiga get failed (status=#{resp.status} url=#{url})" if resp.status != 200
-
-    resp
+    login.cache(1.minute).get(url)
   end
 
   memoize :api_response, :manga_api_response, :user_api_response

app/logical/note_sanitizer.rb

@@ -1,19 +1,19 @@
 module NoteSanitizer
-  ALLOWED_ELEMENTS = %w(
+  ALLOWED_ELEMENTS = %w[
     code center tn h1 h2 h3 h4 h5 h6 a span div blockquote br p ul li ol em
     strong small big b i font u s pre ruby rb rt rp rtc sub sup hr wbr
-  )
+  ]
 
   ALLOWED_ATTRIBUTES = {
-    :all => %w(style title),
-    "a" => %w(href),
-    "span" => %w(class),
-    "div" => %w(class align),
-    "p" => %w(class align),
-    "font" => %w(color size)
+    :all => %w[style title],
+    "a" => %w[href],
+    "span" => %w[class],
+    "div" => %w[class align],
+    "p" => %w[class align],
+    "font" => %w[color size]
   }
 
-  ALLOWED_PROPERTIES = %w(
+  ALLOWED_PROPERTIES = %w[
     align-items
     background background-color
     border border-color border-image border-radius border-style border-width
@@ -48,7 +48,7 @@ module NoteSanitizer
     word-wrap overflow-wrap
     writing-mode
     vertical-align
-  )
+  ]
 
   def self.sanitize(text)
     text.gsub!(/<( |-|3|:|>|\Z)/, "&lt;\\1")

app/logical/pagination_extension.rb

@@ -46,21 +46,23 @@ module PaginationExtension
   end
 
   def is_first_page?
-    if paginator_mode == :numbered
+    case paginator_mode
+    when :numbered
       current_page == 1
-    elsif paginator_mode == :sequential_before
+    when :sequential_before
       false
-    elsif paginator_mode == :sequential_after
+    when :sequential_after
       size <= records_per_page
     end
   end
 
   def is_last_page?
-    if paginator_mode == :numbered
+    case paginator_mode
+    when :numbered
       current_page >= total_pages
-    elsif paginator_mode == :sequential_before
+    when :sequential_before
       size <= records_per_page
-    elsif paginator_mode == :sequential_after
+    when :sequential_after
       false
     end
   end
@@ -98,11 +100,12 @@ module PaginationExtension
   # we override a rails internal method to discard that extra record. See
   # #2044, #3642.
   def records
-    if paginator_mode == :sequential_before
+    case paginator_mode
+    when :sequential_before
       super.first(records_per_page)
-    elsif paginator_mode == :sequential_after
+    when :sequential_after
       super.first(records_per_page).reverse
-    elsif paginator_mode == :numbered
+    when :numbered
       super
     end
   end

app/logical/post_sets/post.rb

@@ -20,7 +20,7 @@ module PostSets
     end
 
     def has_blank_wiki?
-      tag.present? && !wiki_page.present?
+      tag.present? && wiki_page.nil?
     end
 
     def wiki_page
@@ -94,7 +94,7 @@ module PostSets
     end
 
     def get_post_count
-      if %w(json atom xml).include?(format.downcase)
+      if %w[json atom xml].include?(format.downcase)
         # no need to get counts for formats that don't use a paginator
         nil
       else

app/logical/rate_limiter.rb

@@ -17,14 +17,14 @@ class RateLimiter
 
     case action
     when "users:create"
-      rate, burst = 1.0/5.minutes, 10
+      rate, burst = 1.0 / 5.minutes, 10
     when "emails:update", "sessions:create", "moderation_reports:create"
-      rate, burst = 1.0/1.minute, 10
+      rate, burst = 1.0 / 1.minute, 10
     when "dmails:create", "comments:create", "forum_posts:create", "forum_topics:create"
-      rate, burst = 1.0/1.minute, 50
+      rate, burst = 1.0 / 1.minute, 50
     when "comment_votes:create", "comment_votes:destroy", "post_votes:create",
          "post_votes:destroy", "favorites:create", "favorites:destroy", "post_disapprovals:create"
-      rate, burst = 1.0/1.second, 200
+      rate, burst = 1.0 / 1.second, 200
     else
       rate = user.api_regen_multiplier
       burst = 200

app/logical/recommender_service.rb

@@ -55,7 +55,7 @@ module RecommenderService
 
     if user.present?
       raise User::PrivilegeError unless Pundit.policy!(CurrentUser.user, user).can_see_favorites?
-      max_recommendations = params.fetch(:max_recommendations, user.favorite_count + 500).to_i.clamp(0, 50000)
+      max_recommendations = params.fetch(:max_recommendations, user.favorite_count + 500).to_i.clamp(0, 50_000)
       recs = RecommenderService.recommend_for_user(user, tags: params[:post_tags_match], limit: max_recommendations)
     elsif post.present?
       max_recommendations = params.fetch(:max_recommendations, 100).to_i.clamp(0, 1000)

app/logical/reportbooru_service.rb

@@ -10,7 +10,7 @@ class ReportbooruService
     reportbooru_server.present?
   end
 
-  def missed_search_rankings(expires_in: 1.minutes)
+  def missed_search_rankings(expires_in: 1.minute)
     return [] unless enabled?
 
     response = http.cache(expires_in).get("#{reportbooru_server}/missed_searches")
@@ -20,11 +20,11 @@ class ReportbooruService
     body.lines.map(&:split).map { [_1, _2.to_i] }
   end
 
-  def post_search_rankings(date, expires_in: 1.minutes)
+  def post_search_rankings(date, expires_in: 1.minute)
     request("#{reportbooru_server}/post_searches/rank?date=#{date}", expires_in)
   end
 
-  def post_view_rankings(date, expires_in: 1.minutes)
+  def post_view_rankings(date, expires_in: 1.minute)
     request("#{reportbooru_server}/post_views/rank?date=#{date}", expires_in)
   end
 

app/logical/sources/strategies/twitter.rb

@@ -156,12 +156,12 @@ module Sources::Strategies
         "https://twitter.com/i/web/status/#{status_id}"
       elsif url =~ %r{\Ahttps?://(?:o|image-proxy-origin)\.twimg\.com/\d/proxy\.jpg\?t=(\w+)&}i
         str = Base64.decode64($1)
-        source = URI.extract(str, ['http', 'https'])
+        source = URI.extract(str, %w[http https])
         if source.any?
           source = source[0]
           if source =~ %r{^https?://twitpic.com/show/large/[a-z0-9]+}i
             source.gsub!(%r{show/large/}, "")
-            index = source.rindex('.')
+            index = source.rindex(".")
             source = source[0..index - 1]
           end
           source

app/logical/tag_category.rb

@@ -68,7 +68,7 @@ class TagCategory
     end
 
     def category_ids_regex
-      @@category_ids_regex ||= "[#{category_ids.join("")}]"
+      @@category_ids_regex ||= "[#{category_ids.join}]"
     end
   end
 

app/logical/tag_mover.rb

@@ -82,7 +82,7 @@ class TagMover
     old_cosplay_tag = "#{old_tag.name}_(cosplay)"
     new_cosplay_tag = "#{new_tag.name}_(cosplay)"
 
-    if Tag.nonempty.where(name: old_cosplay_tag).exists?
+    if Tag.nonempty.exists?(name: old_cosplay_tag)
       TagMover.new(old_cosplay_tag, new_cosplay_tag).move!
     end
   end

app/logical/tag_relationship_retirement_service.rb

@@ -16,7 +16,7 @@ module TagRelationshipRetirementService
     if topic.nil?
       CurrentUser.as(User.system) do
         topic = ForumTopic.create!(creator: User.system, title: forum_topic_title, category_id: 1)
-        forum_post = ForumPost.create!(creator: User.system, body: forum_topic_body, topic: topic)
+        ForumPost.create!(creator: User.system, body: forum_topic_body, topic: topic)
       end
     end
     topic
@@ -45,6 +45,6 @@ module TagRelationshipRetirementService
   end
 
   def is_unused?(name)
-    !Post.raw_tag_match(name).where("created_at > ?", THRESHOLD.ago).exists?
+    !Post.raw_tag_match(name).exists?(["created_at > ?", THRESHOLD.ago])
   end
 end

app/logical/upload_service.rb

@@ -1,8 +1,3 @@
-require 'upload_service/controller_helper'
-require 'upload_service/preprocessor'
-require 'upload_service/replacer'
-require 'upload_service/utils'
-
 class UploadService
   attr_reader :params, :post, :upload
 

app/logical/upload_service/preprocessor.rb

@@ -34,15 +34,13 @@ class UploadService
 
     def in_progress?
       if md5.present?
-        return Upload.where(status: "preprocessing", md5: md5).exists?
-      end
-
-      if Utils.is_downloadable?(source)
-        return Upload.where(status: "preprocessing", source: source).exists?
-      end
-
+        Upload.exists?(status: "preprocessing", md5: md5)
+      elsif Utils.is_downloadable?(source)
+        Upload.exists?(status: "preprocessing", source: source)
+      else
         false
       end
+    end
 
     def predecessor
       if md5.present?

app/logical/upload_service/replacer.rb

@@ -11,7 +11,7 @@ class UploadService
     end
 
     def comment_replacement_message(post, replacement)
-      %("#{replacement.creator.name}":[#{Routes.user_path(replacement.creator)}] replaced this post with a new file:\n\n#{replacement_message(post, replacement)})
+      %{"#{replacement.creator.name}":[#{Routes.user_path(replacement.creator)}] replaced this post with a new file:\n\n#{replacement_message(post, replacement)}}
     end
 
     def replacement_message(post, replacement)
@@ -49,7 +49,7 @@ class UploadService
       truncated_source = source.gsub(%r{\Ahttps?://}, "").truncate(64, omission: "...#{source.last(32)}")
 
       if source =~ %r{\Ahttps?://}i
-        %("#{truncated_source}":[#{source}])
+        %{"#{truncated_source}":[#{source}]}
       else
         truncated_source
       end
@@ -70,7 +70,7 @@ class UploadService
         return "file://#{repl.replacement_file.original_filename}"
       end
 
-      if !upload.source.present?
+      if upload.source.blank?
         raise "No source found in upload for replacement"
       end
 

app/logical/upload_service/utils.rb

@@ -14,7 +14,7 @@ class UploadService
     end
 
     def is_downloadable?(source)
-      source =~ /^https?:\/\//
+      source =~ %r{\Ahttps?://}
     end
 
     def generate_resizes(media_file)

app/logical/user_deletion.rb

@@ -42,8 +42,8 @@ class UserDeletion
     user.email_address = nil
     user.last_logged_in_at = nil
     user.last_forum_read_at = nil
-    user.favorite_tags = ''
-    user.blacklisted_tags = ''
+    user.favorite_tags = ""
+    user.blacklisted_tags = ""
     user.hide_deleted_posts = false
     user.show_deleted_children = false
     user.time_zone = "Eastern Time (US & Canada)"

app/models/artist_version.rb

@@ -32,22 +32,18 @@ class ArtistVersion < ApplicationRecord
   extend SearchMethods
 
   def previous
-    @previous ||= begin
-      ArtistVersion.where("artist_id = ? and created_at < ?", artist_id, created_at).order("created_at desc").limit(1).to_a
-    end
+    @previous ||= ArtistVersion.where("artist_id = ? and created_at < ?", artist_id, created_at).order("created_at desc").limit(1).to_a
     @previous.first
   end
 
   def subsequent
-    @subsequent ||= begin
-      ArtistVersion.where("artist_id = ? and created_at > ?", artist_id, created_at).order("created_at asc").limit(1).to_a
-    end
+    @subsequent ||= ArtistVersion.where("artist_id = ? and created_at > ?", artist_id, created_at).order("created_at asc").limit(1).to_a
     @subsequent.first
   end
 
   def current
     @previous ||= begin
-      ArtistVersion.where("artist_id = ?", artist_id).order("created_at desc").limit(1).to_a
+      ArtistVersion.where(artist_id: artist_id).order("created_at desc").limit(1).to_a
     end
     @previous.first
   end
@@ -66,17 +62,17 @@ class ArtistVersion < ApplicationRecord
   end
 
   def other_names_changed(type)
-    other = self.send(type)
+    other = send(type)
     ((other_names - other.other_names) | (other.other_names - other_names)).length.positive?
   end
 
   def urls_changed(type)
-    other = self.send(type)
+    other = send(type)
     ((urls - other.urls) | (other.urls - urls)).length.positive?
   end
 
   def was_deleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_deleted && !other.is_deleted
     else
@@ -85,7 +81,7 @@ class ArtistVersion < ApplicationRecord
   end
 
   def was_undeleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_deleted && other.is_deleted
     else
@@ -94,7 +90,7 @@ class ArtistVersion < ApplicationRecord
   end
 
   def was_banned(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_banned && !other.is_banned
     else
@@ -103,7 +99,7 @@ class ArtistVersion < ApplicationRecord
   end
 
   def was_unbanned(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_banned && other.is_banned
     else

app/models/ban.rb

@@ -12,8 +12,8 @@ class Ban < ApplicationRecord
   validates :reason, presence: true
   validate :user, :validate_user_is_bannable, on: :create
 
-  scope :unexpired, -> { where("bans.created_at + bans.duration > ?", Time.now) }
-  scope :expired, -> { where("bans.created_at + bans.duration <= ?", Time.now) }
+  scope :unexpired, -> { where("bans.created_at + bans.duration > ?", Time.zone.now) }
+  scope :expired, -> { where("bans.created_at + bans.duration <= ?", Time.zone.now) }
   scope :active, -> { unexpired }
 
   def self.search(params)
@@ -48,7 +48,7 @@ class Ban < ApplicationRecord
   end
 
   def update_user_on_destroy
-    user.update_attribute(:is_banned, false)
+    user.update!(is_banned: false)
   end
 
   def user_name
@@ -68,7 +68,7 @@ class Ban < ApplicationRecord
   end
 
   def expired?
-    persisted? && expires_at < Time.now
+    persisted? && expires_at < Time.zone.now
   end
 
   def create_feedback

app/models/bulk_update_request.rb

@@ -1,17 +1,16 @@
 class BulkUpdateRequest < ApplicationRecord
-  attr_accessor :title
-  attr_accessor :reason
+  attr_accessor :title, :reason
 
   belongs_to :user
   belongs_to :forum_topic, optional: true
   belongs_to :forum_post, optional: true
   belongs_to :approver, optional: true, class_name: "User"
 
-  validates_presence_of :reason, on: :create
-  validates_presence_of :script
-  validates_presence_of :title, if: ->(rec) {rec.forum_topic_id.blank?}
-  validates_presence_of :forum_topic, if: ->(rec) {rec.forum_topic_id.present?}
-  validates_inclusion_of :status, :in => %w(pending approved rejected)
+  validates :reason, presence: true, on: :create
+  validates :script, presence: true
+  validates :title, presence: true, if: ->(rec) { rec.forum_topic_id.blank? }
+  validates :forum_topic, presence: true, if: ->(rec) { rec.forum_topic_id.present? }
+  validates :status, inclusion: { in: %w[pending approved rejected] }
   validate :validate_script, if: :script_changed?
 
   before_save :update_tags, if: :script_changed?

app/models/comment.rb

@@ -3,8 +3,8 @@ class Comment < ApplicationRecord
   belongs_to :creator, class_name: "User"
   belongs_to_updater
 
-  has_many :moderation_reports, as: :model
-  has_many :votes, :class_name => "CommentVote", :dependent => :destroy
+  has_many :moderation_reports, as: :model, dependent: :destroy
+  has_many :votes, class_name: "CommentVote", dependent: :destroy
 
   validates :body, presence: true, length: { maximum: 15_000 }, if: :body_changed?
 
@@ -20,9 +20,9 @@ class Comment < ApplicationRecord
 
   deletable
   mentionable(
-    :message_field => :body,
-    :title => ->(user_name) {"#{creator.name} mentioned you in a comment on post ##{post_id}"},
-    :body => ->(user_name) {"@#{creator.name} mentioned you in comment ##{id} on post ##{post_id}:\n\n[quote]\n#{DText.extract_mention(body, "@" + user_name)}\n[/quote]\n"}
+    message_field: :body,
+    title: ->(_user_name) {"#{creator.name} mentioned you in a comment on post ##{post_id}"},
+    body: ->(user_name) {"@#{creator.name} mentioned you in comment ##{id} on post ##{post_id}:\n\n[quote]\n#{DText.extract_mention(body, "@#{user_name}")}\n[/quote]\n"}
   )
 
   module SearchMethods
@@ -55,7 +55,7 @@ class Comment < ApplicationRecord
 
   def update_last_commented_at_on_create
     Post.where(:id => post_id).update_all(:last_commented_at => created_at)
-    if Comment.where("post_id = ?", post_id).count <= Danbooru.config.comment_threshold && !do_not_bump_post?
+    if Comment.where(post_id: post_id).count <= Danbooru.config.comment_threshold && !do_not_bump_post?
       Post.where(:id => post_id).update_all(:last_comment_bumped_at => created_at)
     end
   end

app/models/comment_vote.rb

@@ -7,8 +7,8 @@ class CommentVote < ApplicationRecord
   validate :validate_vote_is_unique, if: :is_deleted_changed?
   validates :score, inclusion: { in: [-1, 1], message: "must be 1 or -1" }
 
-  before_create :update_score_on_create
   before_save :update_score_on_delete_or_undelete, if: -> { !new_record? && is_deleted_changed? }
+  before_create :update_score_on_create
 
   deletable
 

app/models/dmail.rb

@@ -1,5 +1,3 @@
-require 'digest/sha1'
-
 class Dmail < ApplicationRecord
   validate :validate_sender_is_not_limited, on: :create
   validates :title, presence: true, length: { maximum: 200 }, if: :title_changed?

app/models/forum_post.rb

@@ -30,9 +30,9 @@ class ForumPost < ApplicationRecord
 
   deletable
   mentionable(
-    :message_field => :body,
-    :title => ->(user_name) {%{#{creator.name} mentioned you in topic ##{topic_id} (#{topic.title})}},
-    :body => ->(user_name) {%{@#{creator.name} mentioned you in topic ##{topic_id} ("#{topic.title}":[#{Routes.forum_topic_path(topic, page: forum_topic_page)}]):\n\n[quote]\n#{DText.extract_mention(body, "@" + user_name)}\n[/quote]\n}}
+    message_field: :body,
+    title: ->(_user_name) {%{#{creator.name} mentioned you in topic ##{topic_id} (#{topic.title})}},
+    body: ->(user_name) {%{@#{creator.name} mentioned you in topic ##{topic_id} ("#{topic.title}":[#{Routes.forum_topic_path(topic, page: forum_topic_page)}]):\n\n[quote]\n#{DText.extract_mention(body, "@#{user_name}")}\n[/quote]\n}}
   )
 
   module SearchMethods
@@ -74,7 +74,7 @@ class ForumPost < ApplicationRecord
   end
 
   def voted?(user, score)
-    votes.where(creator_id: user.id, score: score).exists?
+    votes.exists?(creator_id: user.id, score: score)
   end
 
   def autoreport_spam
@@ -149,7 +149,7 @@ class ForumPost < ApplicationRecord
 
   def is_original_post?(original_post_id = nil)
     if original_post_id
-      return id == original_post_id
+      id == original_post_id
     else
       ForumPost.exists?(["id = ? and id = (select _.id from forum_posts _ where _.topic_id = ? order by _.id asc limit 1)", id, topic_id])
     end

app/models/forum_post_vote.rb

@@ -7,7 +7,7 @@ class ForumPostVote < ApplicationRecord
   scope :up, -> {where(score: 1)}
   scope :down, -> {where(score: -1)}
   scope :by, ->(user_id) {where(creator_id: user_id)}
-  scope :excluding_user, ->(user_id) {where("creator_id <> ?", user_id)}
+  scope :excluding_user, ->(user_id) { where.not(creator_id: user_id) }
 
   def self.visible(user)
     where(forum_post: ForumPost.visible(user))
@@ -37,14 +37,13 @@ class ForumPostVote < ApplicationRecord
   end
 
   def vote_type
-    if score == 1
-      return "up"
-    elsif score == -1
-      return "down"
-    elsif score == 0
-      return "meh"
-    else
-      raise
+    case score
+    when 1
+      "up"
+    when -1
+      "down"
+    when 0
+      "meh"
     end
   end
 

app/models/forum_topic.rb

@@ -2,13 +2,13 @@ class ForumTopic < ApplicationRecord
   CATEGORIES = {
     0 => "General",
     1 => "Tags",
-    2 => "Bugs & Features"
+    2 => "Bugs & Features",
   }
 
   MIN_LEVELS = {
     None: 0,
     Moderator: User::Levels::MODERATOR,
-    Admin: User::Levels::ADMIN
+    Admin: User::Levels::ADMIN,
   }
 
   belongs_to :creator, class_name: "User"
@@ -17,14 +17,14 @@ class ForumTopic < ApplicationRecord
   has_many :forum_topic_visits
   has_one :forum_topic_visit_by_current_user, -> { where(user_id: CurrentUser.id) }, class_name: "ForumTopicVisit"
   has_one :original_post, -> { order(id: :asc) }, class_name: "ForumPost", foreign_key: "topic_id", inverse_of: :topic
-  has_many :bulk_update_requests, :foreign_key => "forum_topic_id"
-  has_many :tag_aliases, :foreign_key => "forum_topic_id"
-  has_many :tag_implications, :foreign_key => "forum_topic_id"
+  has_many :bulk_update_requests
+  has_many :tag_aliases
+  has_many :tag_implications
 
   validates :title, presence: true, length: { maximum: 200 }, if: :title_changed?
   validates_associated :original_post
-  validates_inclusion_of :category_id, :in => CATEGORIES.keys
-  validates_inclusion_of :min_level, :in => MIN_LEVELS.values
+  validates :category_id, inclusion: { in: CATEGORIES.keys }
+  validates :min_level, inclusion: { in: MIN_LEVELS.values }
 
   accepts_nested_attributes_for :original_post
   after_update :update_orignal_post
@@ -129,9 +129,9 @@ class ForumTopic < ApplicationRecord
     def mark_as_read!(user = CurrentUser.user)
       return if user.is_anonymous?
 
-      match = ForumTopicVisit.where(:user_id => user.id, :forum_topic_id => id).first
-      if match
-        match.update_attribute(:last_read_at, updated_at)
+      visit = ForumTopicVisit.find_by(user_id: user.id, forum_topic_id: id)
+      if visit
+        visit.update!(last_read_at: updated_at)
       else
         ForumTopicVisit.create(:user_id => user.id, :forum_topic_id => id, :last_read_at => updated_at)
       end

app/models/ip_ban.rb

@@ -9,7 +9,7 @@ class IpBan < ApplicationRecord
   deletable
   enum category: {
     full: 0,
-    partial: 100
+    partial: 100,
   }, _suffix: "ban"
 
   def self.visible(user)

app/models/mod_action.rb

@@ -53,7 +53,7 @@ class ModAction < ApplicationRecord
     ip_ban_undelete: 163,
     mass_update: 1000, # XXX unused
     bulk_revert: 1001, # XXX unused
-    other: 2000
+    other: 2000,
   }
 
   def self.visible(user)

app/models/note.rb

@@ -2,9 +2,14 @@ class Note < ApplicationRecord
   class RevertError < StandardError; end
 
   attr_accessor :html_id
+
   belongs_to :post
   has_many :versions, -> {order("note_versions.id ASC")}, :class_name => "NoteVersion", :dependent => :destroy
-  validates_presence_of :x, :y, :width, :height, :body
+  validates :x, presence: true
+  validates :y, presence: true
+  validates :width, presence: true
+  validates :height, presence: true
+  validates :body, presence: true
   validate :note_within_image
   after_save :update_post
   after_save :create_version
@@ -95,7 +100,7 @@ class Note < ApplicationRecord
 
   def revert_to(version)
     if id != version.note_id
-      raise RevertError.new("You cannot revert to a previous version of another note.")
+      raise RevertError, "You cannot revert to a previous version of another note."
     end
 
     self.x = version.x

app/models/note_version.rb

@@ -11,23 +11,17 @@ class NoteVersion < ApplicationRecord
   end
 
   def previous
-    @previous ||= begin
-      NoteVersion.where("note_id = ? and version < ?", note_id, version).order("updated_at desc").limit(1).to_a
-    end
+    @previous ||= NoteVersion.where("note_id = ? and version < ?", note_id, version).order("updated_at desc").limit(1).to_a
     @previous.first
   end
 
   def subsequent
-    @subsequent ||= begin
-      NoteVersion.where("note_id = ? and version > ?", note_id, version).order("updated_at asc").limit(1).to_a
-    end
+    @subsequent ||= NoteVersion.where("note_id = ? and version > ?", note_id, version).order("updated_at asc").limit(1).to_a
     @subsequent.first
   end
 
   def current
-    @current ||= begin
-      NoteVersion.where("note_id = ?", note_id).order("updated_at desc").limit(1).to_a
-    end
+    @current ||= NoteVersion.where(note_id: note_id).order("updated_at desc").limit(1).to_a
     @current.first
   end
 
@@ -42,17 +36,17 @@ class NoteVersion < ApplicationRecord
   end
 
   def was_moved(type)
-    other = self.send(type)
+    other = send(type)
     x != other.x || y != other.y
   end
 
   def was_resized(type)
-    other = self.send(type)
+    other = send(type)
     width != other.width || height != other.height
   end
 
   def was_deleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_active && other.is_active
     else
@@ -61,7 +55,7 @@ class NoteVersion < ApplicationRecord
   end
 
   def was_undeleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_active && !other.is_active
     else

app/models/pool.rb

@@ -4,14 +4,14 @@ class Pool < ApplicationRecord
 
   array_attribute :post_ids, parse: /\d+/, cast: :to_i
 
-  validates_uniqueness_of :name, case_sensitive: false, if: :name_changed?
+  validates :name, uniqueness: { case_sensitive: false }, if: :name_changed?
   validate :validate_name, if: :name_changed?
-  validates_inclusion_of :category, :in => %w(series collection)
+  validates :category, inclusion: { in: %w[series collection] }
   validate :updater_can_edit_deleted
   before_validation :normalize_post_ids
   before_validation :normalize_name
-  after_save :create_version
   after_create :synchronize!
+  after_save :create_version
 
   deletable
 
@@ -47,9 +47,10 @@ class Pool < ApplicationRecord
         q = q.name_matches(params[:name_matches])
       end
 
-      if params[:category] == "series"
+      case params[:category]
+      when "series"
         q = q.series
-      elsif params[:category] == "collection"
+      when "collection"
         q = q.collection
       end
 
@@ -80,7 +81,7 @@ class Pool < ApplicationRecord
 
   def self.named(name)
     if name =~ /^\d+$/
-      where("pools.id = ?", name.to_i)
+      where(id: name.to_i)
     elsif name
       where_ilike(:name, normalize_name_for_search(name))
     else
@@ -93,11 +94,8 @@ class Pool < ApplicationRecord
   end
 
   def versions
-    if PoolVersion.enabled?
-      PoolVersion.where("pool_id = ?", id).order("id asc")
-    else
-      raise "Archive service not configured"
-    end
+    raise NotImplementedError, "Archive service not configured" unless PoolVersion.enabled?
+    PoolVersion.where(pool_id: id).order("id asc")
   end
 
   def is_series?
@@ -126,7 +124,7 @@ class Pool < ApplicationRecord
 
   def revert_to!(version)
     if id != version.pool_id
-      raise RevertError.new("You cannot revert to a previous version of another pool.")
+      raise RevertError, "You cannot revert to a previous version of another pool."
     end
 
     self.post_ids = version.post_ids

app/models/pool_version.rb

@@ -18,7 +18,7 @@ class PoolVersion < ApplicationRecord
     end
 
     def for_user(user_id)
-      where("updater_id = ?", user_id)
+      where(updater_id: user_id)
     end
 
     def for_post_id(post_id)
@@ -65,7 +65,7 @@ class PoolVersion < ApplicationRecord
   def self.queue(pool, updater, updater_ip_addr)
     # queue updates to sqs so that if archives goes down for whatever reason it won't
     # block pool updates
-    raise NotImplementedError.new("Archive service is not configured.") if !enabled?
+    raise NotImplementedError, "Archive service is not configured." if !enabled?
 
     json = {
       pool_id: pool.id,
@@ -93,23 +93,17 @@ class PoolVersion < ApplicationRecord
   end
 
   def previous
-    @previous ||= begin
-      PoolVersion.where("pool_id = ? and version < ?", pool_id, version).order("version desc").limit(1).to_a
-    end
+    @previous ||= PoolVersion.where("pool_id = ? and version < ?", pool_id, version).order("version desc").limit(1).to_a
     @previous.first
   end
 
   def subsequent
-    @subsequent ||= begin
-      PoolVersion.where("pool_id = ? and version > ?", pool_id, version).order("version asc").limit(1).to_a
-    end
+    @subsequent ||= PoolVersion.where("pool_id = ? and version > ?", pool_id, version).order("version asc").limit(1).to_a
     @subsequent.first
   end
 
   def current
-    @current ||= begin
-      PoolVersion.where("pool_id = ?", pool_id).order("version desc").limit(1).to_a
-    end
+    @current ||= PoolVersion.where(pool_id: pool_id).order("version desc").limit(1).to_a
     @current.first
   end
 
@@ -126,12 +120,12 @@ class PoolVersion < ApplicationRecord
   end
 
   def posts_changed(type)
-    other = self.send(type)
+    other = send(type)
     ((post_ids - other.post_ids) | (other.post_ids - post_ids)).length.positive?
   end
 
   def was_deleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_deleted && !other.is_deleted
     else
@@ -140,7 +134,7 @@ class PoolVersion < ApplicationRecord
   end
 
   def was_undeleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_deleted && other.is_deleted
     else
@@ -149,7 +143,7 @@ class PoolVersion < ApplicationRecord
   end
 
   def was_activated(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_active && !other.is_active
     else
@@ -158,7 +152,7 @@ class PoolVersion < ApplicationRecord
   end
 
   def was_deactivated(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_active && other.is_active
     else

app/models/post.rb

@@ -18,8 +18,8 @@ class Post < ApplicationRecord
   before_validation :parse_pixiv_id
   before_validation :blank_out_nonexistent_parents
   before_validation :remove_parent_loops
-  validates_uniqueness_of :md5, :on => :create, message: ->(obj, data) { "duplicate: #{Post.find_by_md5(obj.md5).id}"}
-  validates_inclusion_of :rating, in: %w(s q e), message: "rating must be s, q, or e"
+  validates :md5, uniqueness: { message: ->(post, _data) { "duplicate: #{Post.find_by_md5(post.md5).id}" }}, on: :create
+  validates :rating, inclusion: { in: %w[s q e], message: "rating must be s, q, or e" }
   validates :source, length: { maximum: 1200 }
   validate :added_tags_are_valid
   validate :removed_tags_are_valid
@@ -79,8 +79,8 @@ class Post < ApplicationRecord
 
     module ClassMethods
       def delete_files(post_id, md5, file_ext, force: false)
-        if Post.where(md5: md5).exists? && !force
-          raise DeletionError.new("Files still in use; skipping deletion.")
+        if Post.exists?(md5: md5) && !force
+          raise DeletionError, "Files still in use; skipping deletion."
         end
 
         Danbooru.config.storage_manager.delete_file(post_id, md5, file_ext, :original)
@@ -302,7 +302,7 @@ class Post < ApplicationRecord
       flag = flags.create(reason: reason, is_deletion: is_deletion, creator: CurrentUser.user)
 
       if flag.errors.any?
-        raise PostFlag::Error.new(flag.errors.full_messages.join("; "))
+        raise PostFlag::Error, flag.errors.full_messages.join("; ")
       end
     end
 
@@ -311,7 +311,7 @@ class Post < ApplicationRecord
     end
 
     def disapproved_by?(user)
-      PostDisapproval.where(:user_id => user.id, :post_id => id).exists?
+      PostDisapproval.exists?(user_id: user.id, post_id: id)
     end
 
     def autoban
@@ -353,7 +353,7 @@ class Post < ApplicationRecord
     end
 
     def source_domain
-      return "" unless source =~ %r!\Ahttps?://!i
+      return "" unless source =~ %r{\Ahttps?://}i
 
       url = Addressable::URI.parse(normalized_source)
       url.domain
@@ -400,11 +400,11 @@ class Post < ApplicationRecord
     end
 
     def set_tag_count(category, tagcount)
-      self.send("tag_count_#{category}=", tagcount)
+      send("tag_count_#{category}=", tagcount)
     end
 
     def inc_tag_count(category)
-      set_tag_count(category, self.send("tag_count_#{category}") + 1)
+      set_tag_count(category, send("tag_count_#{category}") + 1)
     end
 
     def set_tag_counts
@@ -469,7 +469,7 @@ class Post < ApplicationRecord
       normalized_tags = filter_metatags(normalized_tags)
       normalized_tags = TagAlias.to_aliased(normalized_tags)
       normalized_tags = remove_negated_tags(normalized_tags)
-      normalized_tags = %w(tagme) if normalized_tags.empty?
+      normalized_tags = %w[tagme] if normalized_tags.empty?
       normalized_tags = add_automatic_tags(normalized_tags)
       normalized_tags = remove_invalid_tags(normalized_tags)
       normalized_tags = Tag.convert_cosplay_tags(normalized_tags)
@@ -496,11 +496,11 @@ class Post < ApplicationRecord
       @negated_tags, tags = tags.partition {|x| x =~ /\A-/i}
       @negated_tags = @negated_tags.map {|x| x[1..-1]}
       @negated_tags = TagAlias.to_aliased(@negated_tags)
-      return tags - @negated_tags
+      tags - @negated_tags
     end
 
     def add_automatic_tags(tags)
-      tags -= %w(incredibly_absurdres absurdres highres lowres huge_filesize flash)
+      tags -= %w[incredibly_absurdres absurdres highres lowres huge_filesize flash]
 
       if has_dimensions?
         if image_width >= 10_000 || image_height >= 10_000
@@ -549,7 +549,7 @@ class Post < ApplicationRecord
         tags -= ["animated_png"]
       end
 
-      return tags
+      tags
     end
 
     def apply_casesensitive_metatags(tags)
@@ -574,7 +574,8 @@ class Post < ApplicationRecord
           end
         end
       end
-      return tags
+
+      tags
     end
 
     def filter_metatags(tags)
@@ -582,7 +583,7 @@ class Post < ApplicationRecord
       tags = apply_categorization_metatags(tags)
       @post_metatags, tags = tags.partition {|x| x =~ /\A(?:-pool|pool|newpool|fav|-fav|child|-child|-favgroup|favgroup|upvote|downvote|status|-status|disapproved):/i}
       apply_pre_metatags
-      return tags
+      tags
     end
 
     def apply_categorization_metatags(tags)
@@ -1043,7 +1044,7 @@ class Post < ApplicationRecord
 
     def revert_to(target)
       if id != target.post_id
-        raise RevertError.new("You cannot revert to a previous version of another post.")
+        raise RevertError, "You cannot revert to a previous version of another post."
       end
 
       self.tag_string = target.tags
@@ -1359,13 +1360,11 @@ class Post < ApplicationRecord
     end
 
     def updater_can_change_rating
-      if rating_changed? && is_rating_locked?
       # Don't forbid changes if the rating lock was just now set in the same update.
-        if !is_rating_locked_changed?
+      if rating_changed? && is_rating_locked? && !is_rating_locked_changed?
         errors.add(:rating, "is locked and cannot be changed. Unlock the post first.")
       end
     end
-    end
 
     def uploader_is_not_limited
       errors.add(:uploader, "have reached your upload limit") if uploader.upload_limit.limited?
@@ -1401,7 +1400,7 @@ class Post < ApplicationRecord
 
     def has_artist_tag
       return if !new_record?
-      return if source !~ %r!\Ahttps?://!
+      return if source !~ %r{\Ahttps?://}
       return if has_tag?("artist_request") || has_tag?("official_art")
       return if tags.any?(&:artist?)
       return if Sources::Strategies.find(source).is_a?(Sources::Strategies::Null)

app/models/post_appeal.rb

@@ -10,7 +10,7 @@ class PostAppeal < ApplicationRecord
   enum status: {
     pending: 0,
     succeeded: 1,
-    rejected: 2
+    rejected: 2,
   }
 
   scope :expired, -> { pending.where("post_appeals.created_at < ?", Danbooru.config.moderation_period.ago) }

app/models/post_approval.rb

@@ -20,7 +20,7 @@ class PostApproval < ApplicationRecord
       errors.add(:base, "You cannot approve a post you uploaded")
     end
 
-    if post.approver == user || post.approvals.where(user: user).exists?
+    if post.approver == user || post.approvals.exists?(user: user)
       errors.add(:base, "You have previously approved this post and cannot approve it again")
     end
   end

app/models/post_disapproval.rb

@@ -5,7 +5,7 @@ class PostDisapproval < ApplicationRecord
   belongs_to :post
   belongs_to :user
   validates :user, uniqueness: { scope: :post, message: "have already hidden this post" }
-  validates_inclusion_of :reason, in: REASONS
+  validates :reason, inclusion: { in: REASONS }
   validate :validate_disapproval
 
   scope :with_message, -> { where.not(message: nil) }

app/models/post_event.rb

@@ -4,6 +4,7 @@ class PostEvent
   include ActiveModel::Serializers::Xml
 
   attr_accessor :event
+
   delegate :created_at, to: :event
 
   def self.find_for_post(post_id)
@@ -62,11 +63,11 @@ class PostEvent
 
   def attributes
     {
-      "creator_id": nil,
-      "created_at": nil,
-      "reason": nil,
-      "status": nil,
-      "type": nil
+      creator_id: nil,
+      created_at: nil,
+      reason: nil,
+      status: nil,
+      type: nil,
     }
   end
 

app/models/post_flag.rb

@@ -18,7 +18,7 @@ class PostFlag < ApplicationRecord
   enum status: {
     pending: 0,
     succeeded: 1,
-    rejected: 2
+    rejected: 2,
   }
 
   scope :by_users, -> { where.not(creator: User.system) }

app/models/post_replacement.rb

@@ -9,7 +9,7 @@ class PostReplacement < ApplicationRecord
   def initialize_fields
     self.creator = CurrentUser.user
     self.original_url = post.source
-    self.tags = post.tag_string + " " + self.tags.to_s
+    self.tags = "#{post.tag_string} #{tags}"
 
     self.old_file_ext = post.file_ext
     self.old_file_size = post.file_size

app/models/post_version.rb

@@ -81,7 +81,7 @@ class PostVersion < ApplicationRecord
       def queue(post)
         # queue updates to sqs so that if archives goes down for whatever reason it won't
         # block post updates
-        raise NotImplementedError.new("Archive service is not configured") if !enabled?
+        raise NotImplementedError, "Archive service is not configured" if !enabled?
 
         json = {
           "post_id" => post.id,
@@ -92,7 +92,7 @@ class PostVersion < ApplicationRecord
           "updater_ip_addr" => CurrentUser.ip_addr.to_s,
           "updated_at" => post.updated_at.try(:iso8601),
           "created_at" => post.created_at.try(:iso8601),
-          "tags" => post.tag_string
+          "tags" => post.tag_string,
         }
         msg = "add post version\n#{json.to_json}"
         sqs_service.send_message(msg, message_group_id: "post:#{post.id}")
@@ -117,25 +117,21 @@ class PostVersion < ApplicationRecord
       # HACK: if all the post versions for this post have already been preloaded,
       # we can use that to avoid a SQL query.
       if association(:post).loaded? && post && post.association(:versions).loaded?
-        ver = [post.versions.sort_by(&:version).reverse.find { |v| v.version < version }]
+        [post.versions.sort_by(&:version).reverse.find { |v| v.version < version }]
       else
-        ver = PostVersion.where("post_id = ? and version < ?", post_id, version).order("version desc").limit(1).to_a
+        PostVersion.where("post_id = ? and version < ?", post_id, version).order("version desc").limit(1).to_a
       end
     end
     @previous.first
   end
 
   def subsequent
-    @subsequent ||= begin
-      PostVersion.where("post_id = ? and version > ?", post_id, version).order("version asc").limit(1).to_a
-    end
+    @subsequent ||= PostVersion.where("post_id = ? and version > ?", post_id, version).order("version asc").limit(1).to_a
     @subsequent.first
   end
 
   def current
-    @current ||= begin
-      PostVersion.where("post_id = ?", post_id).order("version desc").limit(1).to_a
-    end
+    @current ||= PostVersion.where(post_id: post_id).order("version desc").limit(1).to_a
     @current.first
   end
 
@@ -167,11 +163,11 @@ class PostVersion < ApplicationRecord
 
   def changes
     delta = {
-      :added_tags => added_tags,
-      :removed_tags => removed_tags,
-      :obsolete_removed_tags => [],
-      :obsolete_added_tags => [],
-      :unchanged_tags => []
+      added_tags: added_tags,
+      removed_tags: removed_tags,
+      obsolete_removed_tags: [],
+      obsolete_added_tags: [],
+      unchanged_tags: [],
     }
 
     return delta if post.nil?
@@ -252,9 +248,10 @@ class PostVersion < ApplicationRecord
     removed = changes[:removed_tags] - changes[:obsolete_removed_tags]
 
     added.each do |tag|
-      if tag =~ /^source:/
+      case tag
+      when /^source:/
         post.source = ""
-      elsif tag =~ /^parent:/
+      when /^parent:/
         post.parent_id = nil
       else
         escaped_tag = Regexp.escape(tag)

app/models/saved_search.rb

@@ -3,6 +3,7 @@ class SavedSearch < ApplicationRecord
   QUERY_LIMIT = 1000
 
   attr_reader :disable_labels
+
   belongs_to :user
 
   normalize :query, :normalize_query
@@ -146,7 +147,7 @@ class SavedSearch < ApplicationRecord
         PostQueryBuilder.new(query.to_s).normalized_query(sort: false).to_s
       end
 
-      def queries_for(user_id, label: nil, options: {})
+      def queries_for(user_id, label: nil)
         searches = SavedSearch.where(user_id: user_id)
         searches = searches.labeled(label) if label.present?
         queries = searches.map(&:normalized_query)
@@ -167,8 +168,8 @@ class SavedSearch < ApplicationRecord
     end
 
     def rewrite_query(old_name, new_name)
-      self.query.gsub!(/(?:\A| )([-~])?#{Regexp.escape(old_name)}(?: |\z)/i) { " #{$1}#{new_name} " }
-      self.query.strip!
+      query.gsub!(/(?:\A| )([-~])?#{Regexp.escape(old_name)}(?: |\z)/i) { " #{$1}#{new_name} " }
+      query.strip!
     end
   end
 

app/models/tag.rb

@@ -11,7 +11,7 @@ class Tag < ApplicationRecord
 
   validates :name, tag_name: true, uniqueness: true, on: :create
   validates :name, tag_name: true, on: :name
-  validates_inclusion_of :category, in: TagCategory.category_ids
+  validates :category, inclusion: { in: TagCategory.category_ids }
 
   after_save :update_category_cache, if: :saved_change_to_category?
   after_save :update_category_post_counts, if: :saved_change_to_category?
@@ -21,13 +21,13 @@ class Tag < ApplicationRecord
 
   module ApiMethods
     def to_legacy_json
-      return {
-        "name" => name,
-        "id" => id,
-        "created_at" => created_at.try(:strftime, "%Y-%m-%d %H:%M"),
-        "count" => post_count,
-        "type" => category,
-        "ambiguous" => false
+      {
+        name: name,
+        id: id,
+        created_at: created_at.try(:strftime, "%Y-%m-%d %H:%M"),
+        count: post_count,
+        type: category,
+        ambiguous: false,
       }.to_json
     end
   end
@@ -255,7 +255,7 @@ class Tag < ApplicationRecord
 
     def abbreviation_matches(abbrev)
       abbrev = abbrev.downcase.delete_prefix("/")
-      return none if abbrev !~ /\A[a-z0-9\*]*\z/
+      return none if abbrev !~ /\A[a-z0-9*]*\z/
 
       where("regexp_replace(tags.name, ?, '\\1', 'g') LIKE ?", ABBREVIATION_REGEXP.source, abbrev.to_escaped_for_sql_like)
     end
@@ -309,7 +309,7 @@ class Tag < ApplicationRecord
 
     def names_matches_with_aliases(name, limit)
       name = normalize_name(name)
-      wildcard_name = name + '*'
+      wildcard_name = "#{name}*"
 
       query1 =
         Tag

app/models/tag_relationship.rb

@@ -21,7 +21,8 @@ class TagRelationship < ApplicationRecord
 
   before_validation :normalize_names
   validates :status, inclusion: { in: %w[active deleted retired] }
-  validates_presence_of :antecedent_name, :consequent_name
+  validates :antecedent_name, presence: true
+  validates :consequent_name, presence: true
   validates :approver, presence: { message: "must exist" }, if: -> { approver_id.present? }
   validates :forum_topic, presence: { message: "must exist" }, if: -> { forum_topic_id.present? }
   validate :antecedent_and_consequent_are_different
@@ -110,7 +111,7 @@ class TagRelationship < ApplicationRecord
   end
 
   def self.approve!(antecedent_name:, consequent_name:, approver:, forum_topic: nil)
-    ProcessTagRelationshipJob.perform_later(class_name: self.name, approver: approver, antecedent_name: antecedent_name, consequent_name: consequent_name, forum_topic: forum_topic)
+    ProcessTagRelationshipJob.perform_later(class_name: name, approver: approver, antecedent_name: antecedent_name, consequent_name: consequent_name, forum_topic: forum_topic)
   end
 
   def self.model_restriction(table)

app/models/upload.rb

@@ -62,13 +62,14 @@ class Upload < ApplicationRecord
   end
 
   attr_accessor :as_pending, :replaced_post, :file
+
   belongs_to :uploader, :class_name => "User"
   belongs_to :post, optional: true
 
   before_validation :initialize_attributes, on: :create
   before_validation :assign_rating_from_tags
   # validates :source, format: { with: /\Ahttps?/ }, if: ->(record) {record.file.blank?}, on: :create
-  validates :rating, inclusion: { in: %w(q e s) }, allow_nil: true
+  validates :rating, inclusion: { in: %w[q e s] }, allow_nil: true
   validates :md5, confirmation: true, if: ->(rec) { rec.md5_confirmation.present? }
   validates_with FileValidator, on: :file
   serialize :context, JSON
@@ -109,7 +110,7 @@ class Upload < ApplicationRecord
 
     def delete_files
       # md5 is blank if the upload errored out before downloading the file.
-      if is_completed? || md5.blank? || Upload.where(md5: md5).exists? || Post.where(md5: md5).exists?
+      if is_completed? || md5.blank? || Upload.exists?(md5: md5) || Post.exists?(md5: md5)
         return
       end
 
@@ -170,7 +171,7 @@ class Upload < ApplicationRecord
       source = source.unicode_normalize(:nfc)
 
       # percent encode unicode characters in urls
-      if source =~ %r!\Ahttps?://!i
+      if source =~ %r{\Ahttps?://}i
         source = Addressable::URI.normalized_encode(source) rescue source
       end
 
@@ -178,7 +179,7 @@ class Upload < ApplicationRecord
     end
 
     def source_url
-      return nil unless source =~ %r!\Ahttps?://!i
+      return nil unless source =~ %r{\Ahttps?://}i
       Addressable::URI.heuristic_parse(source) rescue nil
     end
   end

app/models/user.rb

@@ -1,5 +1,3 @@
-require 'digest/sha1'
-
 class User < ApplicationRecord
   class Error < StandardError; end
   class PrivilegeError < StandardError; end
@@ -17,10 +15,7 @@ class User < ApplicationRecord
   end
 
   # Used for `before_action :<role>_only`. Must have a corresponding `is_<role>?` method.
-  Roles = Levels.constants.map(&:downcase) + [
-    :banned,
-    :approver
-  ]
+  Roles = Levels.constants.map(&:downcase) + %i[banned approver]
 
   # candidates for removal:
   # - enable_post_navigation (disabled by 700)
@@ -36,7 +31,7 @@ class User < ApplicationRecord
   # - enable_recommended_posts
   # - has_mail
   # - is_super_voter
-  BOOLEAN_ATTRIBUTES = %w(
+  BOOLEAN_ATTRIBUTES = %w[
     is_banned
     has_mail
     receive_email_notifications
@@ -67,7 +62,7 @@ class User < ApplicationRecord
     no_feedback
     requires_verification
     is_verified
-  )
+  ]
 
   DEFAULT_BLACKLIST = ["spoilers", "guro", "scat", "furry -rating:s"].join("\n")
 
@@ -104,10 +99,10 @@ class User < ApplicationRecord
 
   after_initialize :initialize_attributes, if: :new_record?
   validates :name, user_name: true, on: :create
-  validates_length_of :password, :minimum => 5, :if => ->(rec) { rec.new_record? || rec.password.present?}
-  validates_inclusion_of :default_image_size, :in => %w(large original)
-  validates_inclusion_of :per_page, in: (1..PostSets::Post::MAX_PER_PAGE)
-  validates_confirmation_of :password
+  validates :password, length: { minimum: 5 }, if: ->(rec) { rec.new_record? || rec.password.present? }
+  validates :default_image_size, inclusion: { in: %w[large original] }
+  validates :per_page, inclusion: { in: (1..PostSets::Post::MAX_PER_PAGE) }
+  validates :password, confirmation: true
   validates :comment_threshold, inclusion: { in: (-100..5) }
   before_validation :normalize_blacklisted_tags
   before_create :promote_to_owner_if_first_user
@@ -233,13 +228,13 @@ class User < ApplicationRecord
       end
 
       def anonymous
-        user = User.new(name: "Anonymous", level: Levels::ANONYMOUS, created_at: Time.now)
+        user = User.new(name: "Anonymous", level: Levels::ANONYMOUS, created_at: Time.zone.now)
         user.freeze.readonly!
         user
       end
 
       def level_hash
-        return {
+        {
           "Restricted" => Levels::RESTRICTED,
           "Member" => Levels::MEMBER,
           "Gold" => Levels::GOLD,
@@ -247,7 +242,7 @@ class User < ApplicationRecord
           "Builder" => Levels::BUILDER,
           "Moderator" => Levels::MODERATOR,
           "Admin" => Levels::ADMIN,
-          "Owner" => Levels::OWNER
+          "Owner" => Levels::OWNER,
         }
       end
 
@@ -293,7 +288,7 @@ class User < ApplicationRecord
     def promote_to_owner_if_first_user
       return if Rails.env.test?
 
-      if name != Danbooru.config.system_user && !User.where(level: Levels::OWNER).exists?
+      if name != Danbooru.config.system_user && !User.exists?(level: Levels::OWNER)
         self.level = Levels::OWNER
         self.can_approve_posts = true
         self.can_upload_free = true
@@ -386,12 +381,12 @@ class User < ApplicationRecord
     end
 
     def rewrite_blacklist(old_name, new_name)
-      self.blacklisted_tags.gsub!(/(?:^| )([-~])?#{Regexp.escape(old_name)}(?: |$)/i) { " #{$1}#{new_name} " }
+      blacklisted_tags.gsub!(/(?:^| )([-~])?#{Regexp.escape(old_name)}(?: |$)/i) { " #{$1}#{new_name} " }
     end
 
     def normalize_blacklisted_tags
       return unless blacklisted_tags.present?
-      self.blacklisted_tags = self.blacklisted_tags.lines.map(&:strip).join("\n")
+      self.blacklisted_tags = blacklisted_tags.lines.map(&:strip).join("\n")
     end
   end
 
@@ -615,7 +610,8 @@ class User < ApplicationRecord
       params = params.dup
       params[:name_matches] = params.delete(:name) if params[:name].present?
 
-      q = search_attributes(params,
+      q = search_attributes(
+        params,
         :id, :created_at, :updated_at, :name, :level, :post_upload_count,
         :post_update_count, :note_update_count, :favorite_count, :posts,
         :note_versions, :artist_commentary_versions, :post_appeals,

app/models/user_feedback.rb

@@ -1,11 +1,12 @@
 class UserFeedback < ApplicationRecord
   self.table_name = "user_feedback"
 
+  attr_accessor :disable_dmail_notification
+
   belongs_to :user
   belongs_to :creator, class_name: "User"
-  attr_accessor :disable_dmail_notification
-  validates_presence_of :body, :category
-  validates_inclusion_of :category, :in => %w(positive negative neutral)
+  validates :body, presence: true
+  validates :category, presence: true, inclusion: { in: %w[positive negative neutral] }
   after_create :create_dmail, unless: :disable_dmail_notification
   after_update(:if => ->(rec) { CurrentUser.id != rec.creator_id}) do |rec|
     ModAction.log(%{#{CurrentUser.user.name} updated user feedback for "#{rec.user.name}":#{Routes.user_path(rec.user)}}, :user_feedback_update)

app/models/user_name_change_request.rb

@@ -4,7 +4,8 @@ class UserNameChangeRequest < ApplicationRecord
 
   validate :not_limited, on: :create
   validates :desired_name, user_name: true, confirmation: true, on: :create
-  validates_presence_of :original_name, :desired_name
+  validates :original_name, presence: true
+  validates :desired_name, presence: true
 
   after_create :update_name!
 
@@ -28,7 +29,7 @@ class UserNameChangeRequest < ApplicationRecord
   end
 
   def not_limited
-    if UserNameChangeRequest.unscoped.where(user: user).where("created_at >= ?", 1.week.ago).exists?
+    if UserNameChangeRequest.unscoped.where(user: user).exists?(["created_at >= ?", 1.week.ago])
       errors.add(:base, "You can only submit one name change request per week")
     end
   end

app/models/user_upgrade.rb

@@ -5,7 +5,7 @@ class UserUpgrade < ApplicationRecord
   enum upgrade_type: {
     gold: 0,
     platinum: 10,
-    gold_to_platinum: 20
+    gold_to_platinum: 20,
   }, _suffix: "upgrade"
 
   enum status: {
@@ -175,7 +175,7 @@ class UserUpgrade < ApplicationRecord
           country: country,
           is_gift: is_gift?,
           level: level,
-        },
+        }
       )
 
       update!(stripe_id: checkout.id)

app/models/wiki_page.rb

@@ -118,13 +118,13 @@ class WikiPage < ApplicationRecord
 
     tag_was = Tag.find_by_name(Tag.normalize_name(title_was))
     if tag_was.present? && !tag_was.empty?
-      warnings.add(:base, %!Warning: {{#{title_was}}} still has #{tag_was.post_count} #{"post".pluralize(tag_was.post_count)}. Be sure to move the posts!)
+      warnings.add(:base, %{Warning: {{#{title_was}}} still has #{tag_was.post_count} #{"post".pluralize(tag_was.post_count)}. Be sure to move the posts})
     end
 
     broken_wikis = WikiPage.linked_to(title_was)
     if broken_wikis.count > 0
       broken_wiki_search = Routes.wiki_pages_path(search: { linked_to: title_was })
-      warnings.add(:base, %!Warning: [[#{title_was}]] is still linked from "#{broken_wikis.count} #{"other wiki page".pluralize(broken_wikis.count)}":[#{broken_wiki_search}]. Update #{(broken_wikis.count > 1) ? "these wikis" : "this wiki"} to link to [[#{title}]] instead!)
+      warnings.add(:base, %{Warning: [[#{title_was}]] is still linked from "#{broken_wikis.count} #{"other wiki page".pluralize(broken_wikis.count)}":[#{broken_wiki_search}]. Update #{(broken_wikis.count > 1) ? "these wikis" : "this wiki"} to link to [[#{title}]] instead})
     end
   end
 
@@ -136,7 +136,7 @@ class WikiPage < ApplicationRecord
 
   def revert_to(version)
     if id != version.wiki_page_id
-      raise RevertError.new("You cannot revert to a previous version of another wiki page.")
+      raise RevertError, "You cannot revert to a previous version of another wiki page."
     end
 
     self.title = version.title

app/models/wiki_page_version.rb

@@ -21,23 +21,17 @@ class WikiPageVersion < ApplicationRecord
   end
 
   def previous
-    @previous ||= begin
-      WikiPageVersion.where("wiki_page_id = ? and id < ?", wiki_page_id, id).order("id desc").limit(1).to_a
-    end
+    @previous ||= WikiPageVersion.where("wiki_page_id = ? and id < ?", wiki_page_id, id).order("id desc").limit(1).to_a
     @previous.first
   end
 
   def subsequent
-    @subsequent ||= begin
-      WikiPageVersion.where("wiki_page_id = ? and id > ?", wiki_page_id, id).order("id asc").limit(1).to_a
-    end
+    @subsequent ||= WikiPageVersion.where("wiki_page_id = ? and id > ?", wiki_page_id, id).order("id asc").limit(1).to_a
     @subsequent.first
   end
 
   def current
-    @current ||= begin
-      WikiPageVersion.where("wiki_page_id = ?", wiki_page_id).order("id desc").limit(1).to_a
-    end
+    @current ||= WikiPageVersion.where(wiki_page_id: wiki_page_id).order("id desc").limit(1).to_a
     @current.first
   end
 
@@ -52,12 +46,12 @@ class WikiPageVersion < ApplicationRecord
   end
 
   def other_names_changed(type)
-    other = self.send(type)
+    other = send(type)
     ((other_names - other.other_names) | (other.other_names - other_names)).length.positive?
   end
 
   def was_deleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       is_deleted && !other.is_deleted
     else
@@ -66,7 +60,7 @@ class WikiPageVersion < ApplicationRecord
   end
 
   def was_undeleted(type)
-    other = self.send(type)
+    other = send(type)
     if type == "previous"
       !is_deleted && other.is_deleted
     else

app/policies/api_key_policy.rb

@@ -24,7 +24,7 @@ class ApiKeyPolicy < ApplicationPolicy
   end
 
   def permitted_attributes
-    [:name, :permitted_ip_addresses, permissions: []]
+    [:name, :permitted_ip_addresses, { permissions: [] }]
   end
 
   def api_attributes

app/policies/application_policy.rb

@@ -69,7 +69,7 @@ class ApplicationPolicy
   # The list of attributes that are permitted to be returned by the API.
   def api_attributes
     # XXX allow inet
-    record.class.attribute_types.reject { |name, attr| attr.type.in?([:inet, :tsvector]) }.keys.map(&:to_sym)
+    record.class.attribute_types.reject { |_name, attr| attr.type.in?([:inet, :tsvector]) }.keys.map(&:to_sym)
   end
 
   # The list of attributes that are permitted to be used as data-* attributes

app/policies/favorite_group_policy.rb

@@ -16,6 +16,6 @@ class FavoriteGroupPolicy < ApplicationPolicy
   end
 
   def permitted_attributes
-    [:name, :post_ids_string, :is_public, :post_ids, post_ids: []]
+    [:name, :post_ids_string, :is_public, :post_ids, { post_ids: [] }]
   end
 end

app/policies/forum_topic_policy.rb

@@ -34,7 +34,7 @@ class ForumTopicPolicy < ApplicationPolicy
   def permitted_attributes
     [
       :title, :category_id, { original_post_attributes: [:id, :body] },
-      ([:is_sticky, :is_locked, :min_level] if moderate?)
+      ([:is_sticky, :is_locked, :min_level] if moderate?),
     ].compact.flatten
   end
 

app/policies/pool_policy.rb

@@ -20,7 +20,7 @@ class PoolPolicy < ApplicationPolicy
   end
 
   def permitted_attributes
-    [:name, :description, :category, :post_ids, :post_ids_string, post_ids: []]
+    [:name, :description, :category, :post_ids, :post_ids_string, { post_ids: [] }]
   end
 
   def api_attributes

app/policies/post_replacement_policy.rb

@@ -8,12 +8,14 @@ class PostReplacementPolicy < ApplicationPolicy
   end
 
   def permitted_attributes_for_create
-    [:replacement_url, :replacement_file, :final_source, :tags]
+    %i[replacement_url replacement_file final_source tags]
   end
 
   def permitted_attributes_for_update
-    [:old_file_ext, :old_file_size, :old_image_width, :old_image_height,
-     :old_md5, :file_ext, :file_size, :image_width, :image_height, :md5,
-     :original_url, :replacement_url]
+    %i[
+      old_file_ext old_file_size old_image_width old_image_height old_md5
+      file_ext file_size image_width image_height md5 original_url
+      replacement_url
+    ]
   end
 end

app/policies/user_policy.rb

@@ -36,15 +36,15 @@ class UserPolicy < ApplicationPolicy
   end
 
   def permitted_attributes_for_update
-    [
-      :comment_threshold, :default_image_size, :favorite_tags,
-      :blacklisted_tags, :time_zone, :per_page, :custom_style, :theme,
-      :receive_email_notifications, :always_resize_images,
-      :new_post_navigation_layout, :enable_private_favorites,
-      :hide_deleted_posts, :style_usernames, :show_deleted_children,
-      :disable_categorized_saved_searches, :disable_tagged_filenames,
-      :disable_cropped_thumbnails, :disable_mobile_gestures, :enable_safe_mode,
-      :enable_desktop_mode, :disable_post_tooltips,
+    %i[
+      comment_threshold default_image_size favorite_tags
+      blacklisted_tags time_zone per_page custom_style theme
+      receive_email_notifications always_resize_images
+      new_post_navigation_layout enable_private_favorites
+      hide_deleted_posts style_usernames show_deleted_children
+      disable_categorized_saved_searches disable_tagged_filenames
+      disable_cropped_thumbnails disable_mobile_gestures enable_safe_mode
+      enable_desktop_mode disable_post_tooltips
     ].compact
   end
 

app/presenters/post_presenter.rb

@@ -1,5 +1,6 @@
 class PostPresenter
   attr_reader :pool, :next_post_in_pool
+
   delegate :split_tag_list_text, to: :tag_set_presenter
 
   def initialize(post)

app/presenters/tag_set_presenter.rb

@@ -55,7 +55,7 @@ class TagSetPresenter
   end
 
   def ordered_tags
-    names_to_tags = tags.map { |tag| [tag.name, tag] }.to_h
+    names_to_tags = tags.index_by(&:name)
 
     tag_names.map do |name|
       names_to_tags[name] || Tag.new(name: name).freeze