code: def execute(self, using, inserted_entities):
          
  
          def format_field(format, inserted_entities):
              if callable(format):
                  return format(inserted_entities)
              return format
  
          def turn_off_auto_add(model):
              for field in model._meta.fields:
                  if getattr(field, 'auto_now', False):
                      field.auto_now = False
                  if getattr(field, 'auto_now_add', False):
                      field.auto_now_add = False
  
          manager = self.model.objects.db_manager(using=using)
          turn_off_auto_add(manager.model)
  
          faker_data = {
              field: format_field(field_format, inserted_entities)
              for field, field_format in self.field_formatters.items()
          }
  
          # max length restriction check
          for data_field in faker_data:
              field = self.model._meta.get_field(data_field)
  
              if field.max_length and isinstance(faker_data[data_field], str):
                  faker_data[data_field] = faker_data[data_field][:field.max_length]
  
          obj = manager.create(**faker_data)
  
          return obj.pk
docs: Execute the stages entities to insert
          :param using:
          :param inserted_entities: