我有一个graphene-python DjangoObjectType类,我想添加一个自定义类型,但我不知道如何在解析器函数中获取当前模型实例。我关注this tutorial,但我找不到任何参考。
这是我的DjangoObjectTypeClass:
class ReservationComponentType(DjangoObjectType):
component_str = graphene.String()
class Meta:
model = ReservationComponent
def resolve_component_str(self, info):
# How can I get the current ReservationComponent instance here?. I guess it is somewehere in 'info',
# but documentation says nothing about it
current_reservation_component = info.get('reservation_component')
component = current_reservation_component.get_component()
return component.name
我的问题与Graphene resolver for an object that has no model不同,因为我的对象有一个模型。我不知道为什么它被标记为“可能重复”,具有如此明显的差异。实际上,我的问题是基于该模型。
是的,它在info
的某处,即:
type_model = info.parent_type.graphene_type._meta.model
但是如果你使用DjangoObjectType
,那么实例将被传递给self
。所以你可能会采取另一种方式:
class ReservationComponentType(DjangoObjectType):
component_str = graphene.String()
class Meta:
model = ReservationComponent
def resolve_component_str(self, info):
# self is already an instance of type's model (not sure if it is in all cases):
component_class = self.__class__
current_reservation_component = info.get('reservation_component')
component = current_reservation_component.get_component()
return component.name