Add missing primary keys to accounts_tags and statuses_tags (#25210)

db/migrate/20230531153942_add_primary_key_to_accounts_tags_join_table.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class AddPrimaryKeyToAccountsTagsJoinTable < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def up
+    ActiveRecord::Base.transaction do
+      safety_assured do
+        execute 'ALTER TABLE accounts_tags ADD PRIMARY KEY USING INDEX index_accounts_tags_on_tag_id_and_account_id'
+
+        # Rename for consistency as the primary key's name is not represented in db/schema.rb
+        execute 'ALTER INDEX index_accounts_tags_on_tag_id_and_account_id RENAME TO accounts_tags_pkey'
+      end
+    end
+  end
+
+  def down
+    safety_assured do
+      # I have found no way to demote the primary key to an index, instead, re-create the index
+      execute 'CREATE UNIQUE INDEX CONCURRENTLY index_accounts_tags_on_tag_id_and_account_id ON accounts_tags (tag_id, account_id)'
+      execute 'ALTER TABLE accounts_tags DROP CONSTRAINT accounts_tags_pkey'
+    end
+  end
+end

db/migrate/20230531154811_add_primary_key_to_statuses_tags_join_table.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class AddPrimaryKeyToStatusesTagsJoinTable < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def up
+    ActiveRecord::Base.transaction do
+      safety_assured do
+        execute 'ALTER TABLE statuses_tags ADD PRIMARY KEY USING INDEX index_statuses_tags_on_tag_id_and_status_id'
+
+        # Rename for consistency as the primary key's name is not represented in db/schema.rb
+        execute 'ALTER INDEX index_statuses_tags_on_tag_id_and_status_id RENAME TO statuses_tags_pkey'
+      end
+    end
+  end
+
+  def down
+    safety_assured do
+      # I have found no way to demote the primary key to an index, instead, re-create the index
+      execute 'CREATE UNIQUE INDEX CONCURRENTLY index_statuses_tags_on_tag_id_and_status_id ON statuses_tags (tag_id, status_id)'
+      execute 'ALTER TABLE statuses_tags DROP CONSTRAINT statuses_tags_pkey'
+    end
+  end
+end