Revamp notification policy options (#31343)

db/post_migrate/20240808124339_post_deployment_migrate_notifications_policy_v2.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class PostDeploymentMigrateNotificationsPolicyV2 < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction!
+
+  # Dummy classes, to make migration possible across version changes
+  class NotificationPolicy < ApplicationRecord; end
+
+  def up
+    NotificationPolicy.in_batches.update_all(<<~SQL.squish)
+      for_not_following = CASE filter_not_following WHEN true THEN 1 ELSE 0 END,
+      for_not_followers = CASE filter_not_following WHEN true THEN 1 ELSE 0 END,
+      for_new_accounts = CASE filter_new_accounts WHEN true THEN 1 ELSE 0 END,
+      for_private_mentions = CASE filter_private_mentions WHEN true THEN 1 ELSE 0 END
+    SQL
+  end
+
+  def down
+    NotificationPolicy.in_batches.update_all(<<~SQL.squish)
+      filter_not_following = CASE for_not_following WHEN 0 THEN false ELSE true END,
+      filter_not_following = CASE for_not_followers WHEN 0 THEN false ELSE true END,
+      filter_new_accounts = CASE for_new_accounts WHEN 0 THEN false ELSE true END,
+      filter_private_mentions = CASE for_private_mentions WHEN 0 THEN false ELSE true END
+    SQL
+  end
+end

db/post_migrate/20240808125420_drop_old_policies_from_notifications_policy.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+class DropOldPoliciesFromNotificationsPolicy < ActiveRecord::Migration[7.1]
+  def change
+    safety_assured do
+      remove_column :notification_policies, :filter_not_following, :boolean, default: false, null: false
+      remove_column :notification_policies, :filter_not_followers, :boolean, default: false, null: false
+      remove_column :notification_policies, :filter_new_accounts, :boolean, default: false, null: false
+      remove_column :notification_policies, :filter_private_mentions, :boolean, default: true, null: false
+    end
+  end
+end