Enable frozen string literals.

Make all string literals immutable by default.

app/models/api_key.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApiKey < ApplicationRecord
   attribute :permitted_ip_addresses, :ip_address, array: true
   attribute :last_ip_address, :ip_address

app/models/application_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 

app/models/artist.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Artist < ApplicationRecord
   extend Memoist
   class RevertError < StandardError; end

app/models/artist_commentary.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ArtistCommentary < ApplicationRecord
   class RevertError < StandardError; end
 

app/models/artist_commentary_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ArtistCommentaryVersion < ApplicationRecord
   belongs_to :post
   belongs_to_updater

app/models/artist_url.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ArtistUrl < ApplicationRecord
   before_validation :initialize_normalized_url, on: :create
   before_validation :normalize

app/models/artist_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ArtistVersion < ApplicationRecord
   array_attribute :urls
   array_attribute :other_names

app/models/ban.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Ban < ApplicationRecord
   attribute :duration, :interval
 

app/models/bulk_update_request.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BulkUpdateRequest < ApplicationRecord
   STATUSES = %w[pending approved rejected processing failed]
 

app/models/comment.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Comment < ApplicationRecord
   belongs_to :post
   belongs_to :creator, class_name: "User"

app/models/comment_vote.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CommentVote < ApplicationRecord
   attr_accessor :updater
 

app/models/dmail.rb

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

app/models/dtext_link.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DtextLink < ApplicationRecord
   belongs_to :model, polymorphic: true
   belongs_to :linked_wiki, primary_key: :title, foreign_key: :link_target, class_name: "WikiPage", optional: true

app/models/email_address.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EmailAddress < ApplicationRecord
   belongs_to :user, inverse_of: :email_address
 

app/models/favorite.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Favorite < ApplicationRecord
   belongs_to :post, counter_cache: :fav_count
   belongs_to :user, counter_cache: :favorite_count

app/models/favorite_group.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class FavoriteGroup < ApplicationRecord
   belongs_to :creator, class_name: "User"
 

app/models/forum_post.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ForumPost < ApplicationRecord
   attr_readonly :topic_id
 

app/models/forum_post_vote.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ForumPostVote < ApplicationRecord
   belongs_to :creator, class_name: "User"
   belongs_to :forum_post

app/models/forum_topic.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ForumTopic < ApplicationRecord
   CATEGORIES = {
     0 => "General",

app/models/forum_topic_visit.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ForumTopicVisit < ApplicationRecord
   belongs_to :user
   belongs_to :forum_topic

app/models/ip_address.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class IpAddress < ApplicationRecord
   belongs_to :model, polymorphic: true
   belongs_to :user

app/models/ip_ban.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class IpBan < ApplicationRecord
   belongs_to :creator, class_name: "User"
 

app/models/ip_geolocation.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # An IpGeolocation contains metadata associated with an IP address, primarily geolocation data.
 
 class IpGeolocation < ApplicationRecord

app/models/media_asset.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class MediaAsset < ApplicationRecord
   class Error < StandardError; end
 

app/models/media_metadata.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # MediaMetadata represents the EXIF and other metadata associated with a
 # MediaAsset (an uploaded image or video file). The `metadata` field contains a
 # JSON hash of the file's metadata as returned by ExifTool.

app/models/mod_action.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ModAction < ApplicationRecord
   belongs_to :creator, :class_name => "User"
 

app/models/moderation_report.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ModerationReport < ApplicationRecord
   MODEL_TYPES = %w[Dmail Comment ForumPost]
 

app/models/news_update.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class NewsUpdate < ApplicationRecord
   belongs_to :creator, class_name: "User"
   belongs_to_updater

app/models/note.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Note < ApplicationRecord
   class RevertError < StandardError; end
 

app/models/note_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class NoteVersion < ApplicationRecord
   belongs_to :post
   belongs_to :note

app/models/pixiv_ugoira_frame_data.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PixivUgoiraFrameData < ApplicationRecord
   belongs_to :post, optional: true, foreign_key: :md5, primary_key: :md5
   belongs_to :media_asset, foreign_key: :md5, primary_key: :md5

app/models/pool.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pool < ApplicationRecord
   class RevertError < StandardError; end
   POOL_ORDER_LIMIT = 1000

app/models/pool_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PoolVersion < ApplicationRecord
   belongs_to :updater, :class_name => "User"
   belongs_to :pool

app/models/post.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Post < ApplicationRecord
   class RevertError < StandardError; end
   class DeletionError < StandardError; end

app/models/post_appeal.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostAppeal < ApplicationRecord
   belongs_to :creator, :class_name => "User"
   belongs_to :post

app/models/post_approval.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostApproval < ApplicationRecord
   belongs_to :user
   belongs_to :post, inverse_of: :approvals

app/models/post_disapproval.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostDisapproval < ApplicationRecord
   DELETION_THRESHOLD = 1.month
   REASONS = %w[breaks_rules poor_quality disinterest]

app/models/post_event.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostEvent
   include ActiveModel::Model
   include ActiveModel::Serializers::JSON

app/models/post_flag.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostFlag < ApplicationRecord
   module Reasons
     UNAPPROVED = "Unapproved in three days"

app/models/post_replacement.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostReplacement < ApplicationRecord
   belongs_to :post
   belongs_to :creator, class_name: "User"

app/models/post_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostVersion < ApplicationRecord
   class RevertError < StandardError; end
   extend Memoist

app/models/post_vote.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostVote < ApplicationRecord
   attr_accessor :updater
 

app/models/rate_limit.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RateLimit < ApplicationRecord
   scope :expired, -> { where("updated_at < ?", 1.hour.ago) }
 

app/models/saved_search.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SavedSearch < ApplicationRecord
   REDIS_EXPIRY = 1.hour
   QUERY_LIMIT = 1000

app/models/tag.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Tag < ApplicationRecord
   ABBREVIATION_REGEXP = /([a-z0-9])[a-z0-9']*($|[^a-z0-9']+)/
 

app/models/tag_alias.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TagAlias < TagRelationship
   # Validate that the alias doesn't exist yet when it's created or when a BUR
   # is requested, but not when a BUR is approved (to allow failed BURs to be reapproved)

app/models/tag_implication.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TagImplication < TagRelationship
   MINIMUM_TAG_COUNT = 10
   MINIMUM_TAG_PERCENTAGE = 0.0001

app/models/tag_relationship.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TagRelationship < ApplicationRecord
   STATUSES = %w[active deleted retired]
 

app/models/upload.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Upload < ApplicationRecord
   class Error < StandardError; end
 

app/models/user.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class User < ApplicationRecord
   class PrivilegeError < StandardError; end
 

app/models/user_event.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # A UserEvent is used to track important events related to a user's account,
 # such as signups, logins, password changes, etc. A UserEvent is associated
 # with a UserSession, which contains the IP and browser information associated

app/models/user_feedback.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UserFeedback < ApplicationRecord
   self.table_name = "user_feedback"
 

app/models/user_name_change_request.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UserNameChangeRequest < ApplicationRecord
   belongs_to :user
   belongs_to :approver, class_name: "User", optional: true

app/models/user_session.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # A UserSession contains browser and IP metadata associated with a UserEvent. This
 # includes the user's session ID from their session cookie, their IP address,
 # and their browser user agent. This is used to track logins and other events.

app/models/user_upgrade.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UserUpgrade < ApplicationRecord
   belongs_to :recipient, class_name: "User"
   belongs_to :purchaser, class_name: "User"

app/models/wiki_page.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class WikiPage < ApplicationRecord
   class RevertError < StandardError; end
 

app/models/wiki_page_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class WikiPageVersion < ApplicationRecord
   array_attribute :other_names
   belongs_to :wiki_page