diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 5639aad70..55ad77a10 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -121,7 +121,7 @@ module ApplicationHelper
     link_to text, wiki_page_path(title), class: "wiki-link", **options
   end
 
-  def link_to_wikis(*wiki_titles, last_word_connector: ", or", **options)
+  def link_to_wikis(*wiki_titles, **options)
     links = wiki_titles.map do |title|
       link_to_wiki title.tr("_", " "), title
     end
@@ -245,7 +245,7 @@ module ApplicationHelper
 
   def data_attributes_for(record, prefix, attributes)
     attributes.map do |attr|
-      if attr.kind_of?(Array)
+      if attr.is_a?(Array)
         name = attr.map {|sym| sym.to_s.dasherize.delete("?")}.join('-')
         value = record
         attr.each do |sym|
@@ -261,7 +261,7 @@ module ApplicationHelper
       if value.nil?
         value = "null"
       end
-      if prefix.length == 0
+      if prefix.blank?
         [:"#{name}", value]
       else
         [:"#{prefix}-#{name}", value]
diff --git a/app/helpers/artist_commentary_versions_helper.rb b/app/helpers/artist_commentary_versions_helper.rb
index 679cb991c..0a52fed5d 100644
--- a/app/helpers/artist_commentary_versions_helper.rb
+++ b/app/helpers/artist_commentary_versions_helper.rb
@@ -2,5 +2,4 @@ module ArtistCommentaryVersionsHelper
   def artist_commentary_versions_listing_type
     params.dig(:search, :post_id).present? ? :revert : :standard
   end
-
 end
diff --git a/app/helpers/note_versions_helper.rb b/app/helpers/note_versions_helper.rb
index 0c3722c96..c29996ef0 100644
--- a/app/helpers/note_versions_helper.rb
+++ b/app/helpers/note_versions_helper.rb
@@ -1,6 +1,6 @@
 module NoteVersionsHelper
   def note_versions_listing_type
-    (params.dig(:search, :post_id).present? || params.dig(:search, :note_id).present?) && CurrentUser.is_member? ? :revert : :standard
+    ((params.dig(:search, :post_id).present? || params.dig(:search, :note_id).present?) && CurrentUser.is_member?) ? :revert : :standard
   end
 
   def note_version_body_diff_info(note_version)
diff --git a/app/helpers/pool_versions_helper.rb b/app/helpers/pool_versions_helper.rb
index a23ddbe43..502000396 100644
--- a/app/helpers/pool_versions_helper.rb
+++ b/app/helpers/pool_versions_helper.rb
@@ -23,4 +23,4 @@ module PoolVersionsHelper
     pattern = Regexp.new('(?:<.+?>)|(?:\w+)|(?:[ \t]+)|(?:\r?\n)|(?:.+?)')
     DiffBuilder.new(other_version.description, pool_version.description, pattern).build
   end
-end
\ No newline at end of file
+end
diff --git a/app/logical/danbooru/http.rb b/app/logical/danbooru/http.rb
index 45771626f..26b3fd9e8 100644
--- a/app/logical/danbooru/http.rb
+++ b/app/logical/danbooru/http.rb
@@ -1,6 +1,6 @@
 module Danbooru
   class Http
-    attr_accessor :cache, :http
+    attr_writer :cache, :http
 
     class << self
       delegate :get, :post, :delete, :cache, :auth, :basic_auth, :headers, to: :new
diff --git a/app/logical/post_query_builder.rb b/app/logical/post_query_builder.rb
index abecb9c08..83c2c07d5 100644
--- a/app/logical/post_query_builder.rb
+++ b/app/logical/post_query_builder.rb
@@ -40,9 +40,7 @@ class PostQueryBuilder
   end
 
   def escape_string_for_tsquery(array)
-    array.map do |token|
-      token.to_escaped_for_tsquery
-    end
+    array.map(&:to_escaped_for_tsquery)
   end
 
   def add_tag_string_search_relation(tags, relation)
@@ -314,7 +312,7 @@ class PostQueryBuilder
         elsif flagger_id == "none"
           relation = relation.where('NOT EXISTS (' + PostFlag.unscoped.search(:category => "normal").where('post_id = posts.id').reorder('').select('1').to_sql + ')')
         elsif CurrentUser.can_view_flagger?(flagger_id)
-          post_ids = PostFlag.unscoped.search(:creator_id => flagger_id, :category => "normal").reorder("").select {|flag| flag.not_uploaded_by?(CurrentUser.id)}.map {|flag| flag.post_id}.uniq
+          post_ids = PostFlag.unscoped.search(creator_id: flagger_id, category: "normal").reorder("").select {|flag| flag.not_uploaded_by?(CurrentUser.id)}.map(&:post_id).uniq
           relation = relation.where("posts.id": post_ids)
         end
       end
diff --git a/app/logical/post_sets/post.rb b/app/logical/post_sets/post.rb
index 7edf5c289..659616e61 100644
--- a/app/logical/post_sets/post.rb
+++ b/app/logical/post_sets/post.rb
@@ -78,11 +78,11 @@ module PostSets
     end
 
     def hidden_posts
-      posts.reject { |p| p.visible? }
+      posts.reject(&:visible?)
     end
 
     def banned_posts
-      posts.select { |p| p.banblocked? }
+      posts.select(&:banblocked?)
     end
 
     def censored_posts
diff --git a/app/logical/post_vote_similarity.rb b/app/logical/post_vote_similarity.rb
index 93bf18243..c42e97854 100644
--- a/app/logical/post_vote_similarity.rb
+++ b/app/logical/post_vote_similarity.rb
@@ -11,8 +11,8 @@ class PostVoteSimilarity
       @score = score
     end
 
-    def <=>(rhs)
-      score <=> rhs.score
+    def <=>(other)
+      score <=> other.score
     end
   end
 
diff --git a/app/logical/sources/strategies/base.rb b/app/logical/sources/strategies/base.rb
index 0f24a5c53..06da88748 100644
--- a/app/logical/sources/strategies/base.rb
+++ b/app/logical/sources/strategies/base.rb
@@ -240,11 +240,6 @@ module Sources
         self.class.to_dtext(artist_commentary_desc)
       end
 
-      # A strategy may return extra data unrelated to the file
-      def data
-        return {}
-      end
-
       # A search query that should return any posts that were previously
       # uploaded from the same source. These may be duplicates, or they may be
       # other posts from the same gallery.
diff --git a/app/logical/sources/strategies/twitter.rb b/app/logical/sources/strategies/twitter.rb
index d8280f193..f6d29c1d0 100644
--- a/app/logical/sources/strategies/twitter.rb
+++ b/app/logical/sources/strategies/twitter.rb
@@ -139,7 +139,7 @@ module Sources::Strategies
 
     def normalize_tag(tag)
       COMMON_TAG_REGEXES.each do |rg|
-        norm_tag = tag.gsub(rg,"")
+        norm_tag = tag.gsub(rg, "")
         if norm_tag != tag
           return norm_tag
         end
diff --git a/app/logical/table_builder.rb b/app/logical/table_builder.rb
index fac059117..4438befef 100644
--- a/app/logical/table_builder.rb
+++ b/app/logical/table_builder.rb
@@ -9,7 +9,7 @@ class TableBuilder
       @block = block
 
       @name = name || attribute
-      @name = @name.to_s.titleize unless @name.kind_of?(String)
+      @name = @name.to_s.titleize unless @name.is_a?(String)
 
       if @name.present?
         column_class = "#{@name.parameterize.dasherize}-column"
@@ -22,7 +22,7 @@ class TableBuilder
       if block.present?
         block.call(item, i, j, self)
         nil
-      elsif attribute.kind_of?(Symbol)
+      elsif attribute.is_a?(Symbol)
         item.send(attribute)
       else
         ""
diff --git a/app/logical/tag_relationship_retirement_service.rb b/app/logical/tag_relationship_retirement_service.rb
index 9e637a0d3..2dbd4304b 100644
--- a/app/logical/tag_relationship_retirement_service.rb
+++ b/app/logical/tag_relationship_retirement_service.rb
@@ -1,5 +1,6 @@
 module TagRelationshipRetirementService
   module_function
+
   THRESHOLD = 2.years
 
   def forum_topic_title
diff --git a/app/logical/upload_service/utils.rb b/app/logical/upload_service/utils.rb
index ad4751050..f13a785a3 100644
--- a/app/logical/upload_service/utils.rb
+++ b/app/logical/upload_service/utils.rb
@@ -1,6 +1,7 @@
 class UploadService
   module Utils
     module_function
+
     class CorruptFileError < RuntimeError; end
 
     def file_header_to_file_ext(file)
diff --git a/app/models/artist.rb b/app/models/artist.rb
index b38cbbe7b..5d435596a 100644
--- a/app/models/artist.rb
+++ b/app/models/artist.rb
@@ -371,7 +371,7 @@ class Artist < ApplicationRecord
       elsif wiki_page.nil?
         # if there are any notes, we need to create a new wiki page
         if @notes.present?
-          wp = create_wiki_page(body: @notes, title: name)
+          create_wiki_page(body: @notes, title: name)
         end
       elsif (!@notes.nil? && (wiki_page.body != @notes)) || wiki_page.title != name
         # if anything changed, we need to update the wiki page
@@ -402,10 +402,10 @@ class Artist < ApplicationRecord
     def unban!
       Post.transaction do
         CurrentUser.without_safe_mode do
-          ti = TagImplication.where(:antecedent_name => name, :consequent_name => "banned_artist").first
+          ti = TagImplication.find_by(antecedent_name: name, consequent_name: "banned_artist")
           ti&.destroy
 
-          Post.tag_match(name).where("true /* Artist.unban */").each do |post|
+          Post.tag_match(name).find_each do |post|
             post.unban!
             fixed_tags = post.tag_string.sub(/(?:\A| )banned_artist(?:\Z| )/, " ").strip
             post.update(tag_string: fixed_tags)
@@ -420,9 +420,7 @@ class Artist < ApplicationRecord
     def ban!
       Post.transaction do
         CurrentUser.without_safe_mode do
-          Post.tag_match(name).where("true /* Artist.ban */").each do |post|
-            post.ban!
-          end
+          Post.tag_match(name).each(&:ban!)
 
           # potential race condition but unlikely
           unless TagImplication.where(:antecedent_name => name, :consequent_name => "banned_artist").exists?
diff --git a/app/models/post.rb b/app/models/post.rb
index 1855a32bd..1accb05d8 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -636,7 +636,7 @@ class Post < ApplicationRecord
     def normalize_tags
       normalized_tags = Tag.scan_tags(tag_string)
       normalized_tags = apply_casesensitive_metatags(normalized_tags)
-      normalized_tags = normalized_tags.map {|tag| tag.downcase}
+      normalized_tags = normalized_tags.map(&:downcase)
       normalized_tags = filter_metatags(normalized_tags)
       normalized_tags = remove_negated_tags(normalized_tags)
       normalized_tags = TagAlias.to_aliased(normalized_tags)
@@ -1256,7 +1256,7 @@ class Post < ApplicationRecord
 
     def children_ids
       if has_children?
-        children.map {|p| p.id}.join(' ')
+        children.map(&:id).join(' ')
       end
     end
   end
@@ -1335,7 +1335,7 @@ class Post < ApplicationRecord
 
       self.is_deleted = false
       self.approver_id = CurrentUser.id
-      flags.each {|x| x.resolve!}
+      flags.each(&:resolve!)
       save
       ModAction.log("undeleted post ##{id}", :post_undelete)
     end