我怎样才能不引发石墨烯 django 突变的错误？

Question

我正在使用 graphene-django-cud 进行突变。但是我不能在突变中引发任何 GraphQLError、ValueError 或 Exception。就像 before_mutate() 或任何 validate_ 方法一样。 该过程只是停止而没有任何错误消息。然后为实例和消息返回 null。

@classmethod
def before_mutate(cls, root, info, input, id):
    print("before_mutate")
    from graphql import GraphQLError
    raise GraphQLError(f"The observation with id {id} doesn't exists")

@classmethod
def validate_name(cls, root, info, value, input, id, obj):
    print("validate_name")
    raise ValueError(f"The observation with id {id} doesn't existssss")

有人见过这个吗？提前致谢！

Answer 1

现在我明白是怎么回事了。

它不是来自 graphene-django-cud，而是来自石墨烯。我必须添加 try/except 来捕捉错误，然后返回一个 GraphQLError。

from graphene import Field
from graphene_django_cud.mutations import DjangoCreateMutation
from graphql import GraphQLError
from .models import Demo
from .types import DemoType
import logging
import traceback

class DemoCreateMutation(DjangoCreateMutation):
    demo = Field(DemoType)

    class Meta:
        model = Demo

    @classmethod
    def mutate(cls, root, info, input):
        try:
            return super().mutate(root, info, input)
        except Exception as e:
            logging.error(str(e))
            return GraphQLError(traceback.format_exc())

    @classmethod
    def before_mutate(cls, root, info, input, id):
        raise GraphQLError(f"The Demo {id} doesn't exists")

    @classmethod
    def validate_name(cls, root, info, value, input, id, obj):
        raise ValueError(f"The Demo {id} doesn't existssss")