Add explicit dependent: nil to associations (#28169)

.rubocop_todo.yml

@@ -112,20 +112,6 @@ Rails/HasAndBelongsToMany:
     - 'app/models/status.rb'
     - 'app/models/tag.rb'
 
-# Configuration parameters: Include.
-# Include: app/models/**/*.rb
-Rails/HasManyOrHasOneDependent:
-  Exclude:
-    - 'app/models/concerns/account/counters.rb'
-    - 'app/models/conversation.rb'
-    - 'app/models/custom_emoji.rb'
-    - 'app/models/custom_emoji_category.rb'
-    - 'app/models/domain_block.rb'
-    - 'app/models/invite.rb'
-    - 'app/models/status.rb'
-    - 'app/models/user.rb'
-    - 'app/models/web/push_subscription.rb'
-
 # Configuration parameters: Include.
 # Include: app/controllers/**/*.rb, app/mailers/**/*.rb
 Rails/LexicallyScopedActionFilter:

app/models/concerns/account/counters.rb

@@ -6,7 +6,7 @@ module Account::Counters
   ALLOWED_COUNTER_KEYS = %i(statuses_count following_count followers_count).freeze
 
   included do
-    has_one :account_stat, inverse_of: :account
+    has_one :account_stat, inverse_of: :account, dependent: nil
     after_save :save_account_stat
   end
 

app/models/conversation.rb

@@ -13,7 +13,7 @@
 class Conversation < ApplicationRecord
   validates :uri, uniqueness: true, if: :uri?
 
-  has_many :statuses
+  has_many :statuses, dependent: nil
 
   def local?
     uri.nil?

app/models/custom_emoji.rb

@@ -37,7 +37,7 @@ class CustomEmoji < ApplicationRecord
 
   belongs_to :category, class_name: 'CustomEmojiCategory', optional: true
 
-  has_one :local_counterpart, -> { where(domain: nil) }, class_name: 'CustomEmoji', primary_key: :shortcode, foreign_key: :shortcode, inverse_of: false
+  has_one :local_counterpart, -> { where(domain: nil) }, class_name: 'CustomEmoji', primary_key: :shortcode, foreign_key: :shortcode, inverse_of: false, dependent: nil
 
   has_attached_file :image, styles: { static: { format: 'png', convert_options: '-coalesce +profile "!icc,*" +set date:modify +set date:create +set date:timestamp' } }, validate_media_type: false
 

app/models/custom_emoji_category.rb

@@ -11,7 +11,7 @@
 #
 
 class CustomEmojiCategory < ApplicationRecord
-  has_many :emojis, class_name: 'CustomEmoji', foreign_key: 'category_id', inverse_of: :category
+  has_many :emojis, class_name: 'CustomEmoji', foreign_key: 'category_id', inverse_of: :category, dependent: nil
 
   validates :name, presence: true, uniqueness: true
 end

app/models/domain_block.rb

@@ -25,7 +25,7 @@ class DomainBlock < ApplicationRecord
 
   validates :domain, presence: true, uniqueness: true, domain: true
 
-  has_many :accounts, foreign_key: :domain, primary_key: :domain, inverse_of: false
+  has_many :accounts, foreign_key: :domain, primary_key: :domain, inverse_of: false, dependent: nil
   delegate :count, to: :accounts, prefix: true
 
   scope :matches_domain, ->(value) { where(arel_table[:domain].matches("%#{value}%")) }

app/models/invite.rb

@@ -20,7 +20,7 @@ class Invite < ApplicationRecord
   include Expireable
 
   belongs_to :user, inverse_of: :invites
-  has_many :users, inverse_of: :invite
+  has_many :users, inverse_of: :invite, dependent: nil
 
   scope :available, -> { where(expires_at: nil).or(where('expires_at >= ?', Time.now.utc)) }
 

app/models/status.rb

@@ -66,12 +66,14 @@ class Status < ApplicationRecord
   has_many :bookmarks, inverse_of: :status, dependent: :destroy
   has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
   has_many :reblogged_by_accounts, through: :reblogs, class_name: 'Account', source: :account
-  has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread
+  has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread, dependent: nil
   has_many :mentions, dependent: :destroy, inverse_of: :status
   has_many :mentioned_accounts, through: :mentions, source: :account, class_name: 'Account'
-  has_many :active_mentions, -> { active }, class_name: 'Mention', inverse_of: :status
   has_many :media_attachments, dependent: :nullify
 
+  # The `dependent` option is enabled by the initial `mentions` association declaration
+  has_many :active_mentions, -> { active }, class_name: 'Mention', inverse_of: :status # rubocop:disable Rails/HasManyOrHasOneDependent
+
   # Those associations are used for the private search index
   has_many :local_mentioned, -> { merge(Account.local) }, through: :active_mentions, source: :account
   has_many :local_favorited, -> { merge(Account.local) }, through: :favourites, source: :account
@@ -80,11 +82,13 @@ class Status < ApplicationRecord
 
   has_and_belongs_to_many :tags
 
-  has_one :preview_cards_status, inverse_of: :status # Because of a composite primary key, the dependent option cannot be used
+  # Because of a composite primary key, the `dependent` option cannot be used on this association
+  has_one :preview_cards_status, inverse_of: :status # rubocop:disable Rails/HasManyOrHasOneDependent
+
   has_one :notification, as: :activity, dependent: :destroy
-  has_one :status_stat, inverse_of: :status
+  has_one :status_stat, inverse_of: :status, dependent: nil
   has_one :poll, inverse_of: :status, dependent: :destroy
-  has_one :trend, class_name: 'StatusTrend', inverse_of: :status
+  has_one :trend, class_name: 'StatusTrend', inverse_of: :status, dependent: nil
 
   validates :uri, uniqueness: true, presence: true, unless: :local?
   validates :text, presence: true, unless: -> { with_media? || reblog? }

app/models/user.rb

@@ -84,12 +84,12 @@ class User < ApplicationRecord
   belongs_to :role, class_name: 'UserRole', optional: true
   accepts_nested_attributes_for :account
 
-  has_many :applications, class_name: 'Doorkeeper::Application', as: :owner
-  has_many :backups, inverse_of: :user
-  has_many :invites, inverse_of: :user
+  has_many :applications, class_name: 'Doorkeeper::Application', as: :owner, dependent: nil
+  has_many :backups, inverse_of: :user, dependent: nil
+  has_many :invites, inverse_of: :user, dependent: nil
   has_many :markers, inverse_of: :user, dependent: :destroy
   has_many :webauthn_credentials, dependent: :destroy
-  has_many :ips, class_name: 'UserIp', inverse_of: :user
+  has_many :ips, class_name: 'UserIp', inverse_of: :user, dependent: nil
 
   has_one :invite_request, class_name: 'UserInviteRequest', inverse_of: :user, dependent: :destroy
   accepts_nested_attributes_for :invite_request, reject_if: ->(attributes) { attributes['text'].blank? && !Setting.require_invite_text }

app/models/web/push_subscription.rb

@@ -19,7 +19,7 @@ class Web::PushSubscription < ApplicationRecord
   belongs_to :user, optional: true
   belongs_to :access_token, class_name: 'Doorkeeper::AccessToken', optional: true
 
-  has_one :session_activation, foreign_key: 'web_push_subscription_id', inverse_of: :web_push_subscription
+  has_one :session_activation, foreign_key: 'web_push_subscription_id', inverse_of: :web_push_subscription, dependent: nil
 
   validates :endpoint, presence: true
   validates :key_p256dh, presence: true