# File lib/active_record/relation.rb, line 345
    def delete_all(conditions = nil)
      IdentityMap.repository[symbolized_base_class] = {} if IdentityMap.enabled?
      if conditions
        where(conditions).delete_all
      else
        statement = arel.compile_delete
        affected = @klass.connection.delete(statement, 'SQL', bind_values)

        reset
        affected
      end
    end