disable_referential_integrity

# File activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb, line 9
        def disable_referential_integrity # :nodoc:
          if supports_disable_referential_integrity?
            original_exception = nil

            begin
              transaction(requires_new: true) do
                execute(tables.collect { |name| "ALTER TABLE #{quote_table_name(name)} DISABLE TRIGGER ALL" }.join(";"))
              end
            rescue ActiveRecord::ActiveRecordError => e
              original_exception = e
            end

            begin
              yield
            rescue ActiveRecord::InvalidForeignKey => e
              warn WARNING: Rails was not able to disable referential integrity.This is most likely caused due to missing permissions.Rails needs superuser privileges to disable referential integrity.    cause: #{original_exception.try(:message)}
              raise e
            end

            begin
              transaction(requires_new: true) do
                execute(tables.collect { |name| "ALTER TABLE #{quote_table_name(name)} ENABLE TRIGGER ALL" }.join(";"))
              end
            rescue ActiveRecord::ActiveRecordError
            end
          else
            yield
          end
        end