last_stored_environment

# File activerecord/lib/active_record/migration.rb, line 1270
      def self.last_stored_environment
        return nil if current_version == 0
        raise NoEnvironmentInSchemaError unless ActiveRecord::InternalMetadata.table_exists?

        environment = ActiveRecord::InternalMetadata[:environment]
        raise NoEnvironmentInSchemaError unless environment
        environment
      end