require Rails.root.join('lib', 'mastodon', 'migration_helpers') class AddFixedLowercaseIndexToAccounts < ActiveRecord::Migration[5.2] include Mastodon::MigrationHelpers disable_ddl_transaction! def up if index_name_exists?(:accounts, 'old_index_accounts_on_username_and_domain_lower') && index_name_exists?(:accounts, 'index_accounts_on_username_and_domain_lower') remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower' elsif index_name_exists?(:accounts, 'index_accounts_on_username_and_domain_lower') rename_index :accounts, 'index_accounts_on_username_and_domain_lower', 'old_index_accounts_on_username_and_domain_lower' end begin add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently rescue ActiveRecord::RecordNotUnique remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower' raise CorruptionError.new('index_accounts_on_username_and_domain_lower') end remove_index :accounts, name: 'old_index_accounts_on_username_and_domain_lower' if index_name_exists?(:accounts, 'old_index_accounts_on_username_and_domain_lower') end def down add_index :accounts, 'lower (username), lower(domain)', name: 'old_index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower' rename_index :accounts, 'old_index_accounts_on_username_and_domain_lower', 'index_accounts_on_username_and_domain_lower' end end