code: def read_list(self, request):
          
          request_filters = request.context_params.get(
              self.request_filters_property, {})
          request_filters.update(**self.get_limit_and_offset(request_filters))
          entities = self.get_entity_list(request, **request_filters)
          request.context_params[self.list_property_name] = entities
  
          # offset and limit don't make sense to get aggregates
          count_request_filters = request_filters.copy()
          count_request_filters.pop('offset', None)
          count_request_filters.pop('limit', None)
          count_request_filters.pop('order_by', None)
          total_count = self.get_entity_list_total_count(request,
                                                         **count_request_filters)
  
          request.context_params[self.entity_list_total_count_property_name] = \
              total_count
          return request
docs: :param request: an apiv2 request object
          :return: request if successful with entities set on request