石墨烯的错误。

Question

I use graphene-django for have a GrapQL API. I have created a mutation in my schema.py :

class UpdateApplication(graphene.Mutation):
    class Input:
        id = graphene.String()
        name = graphene.String()

    application = graphene.Field(ApplicationNode)

    @classmethod
    def mutate(cls, instance, args, info):
        name = args.get('name')
        rid = from_global_id(args.get('id'))[1]
        update_application = Application.objects.filter(id=rid).update(name=name)

        return UpdateApplication(application=update_application)



class Mutation(ObjectType):
    update_application = UpdateApplication.Field()

schema = graphene.Schema(mutation=Mutation)

When I run this resquest, I have an error.

mutation update {
  updateApplication(id: "QXBwbGljYXRpb25Ob2RlOjE=", name: "foo") {
    application {
      name
    }
  }
}

The error:

mutate() takes exactly 4 arguments (5 given)

I put 4 arguments in mutate() not 5... Is it a bug?

Answer 1

As of graphene 1.0, the context is now passed to mutation and resolve functions by default whereas it required @with_context in previous versions: https://github.com/graphql-python/graphene/blob/master/UPGRADE-v1.0.md

So your mutate functions should look like:

def mutate(self, args, context, info):
    name = args.get('name')
    rid = from_global_id(args.get('id'))[1]
    update_application = Application.objects.filter(id=rid).update(name=name)

    return UpdateApplication(application=update_application)