How to return a costume error message in graphene?

[aliscie]

I created the following class to update the post in spesfic conditions but if the contitions ==False the I need to return {"message": "Only the owner of the post and the admin(website's wonr) can edit and delet this post"} But the JsonResponse don't work likt it is with RestFramework!

class UpdatePost(graphene.Mutation):
      # owner(added_by)+admin can update and delete
      class Arguments:
            id = graphene.Int(required=True)
            description = graphene.String()
      post = graphene.Field(schema.Posts)
      @classmethod
      def mutate(cls, root, info, id, description):
            post = models.Post.objects.get(id=id)
            if (info.context.user == post.added_by):
                  post.description = description
                  post.save()
                  return CreatePost(post=post)
            else:
                 JsoneResponse({"message": "Only the owner of the post and the admin(website's wonr) can edit and delet this post"})
  
[code source on stackoveflow](https://stackoverflow.com/posts/66624122/edit)

[zbyte64]

I believe you can raise an exception and the message used for the exception will be sent to the client.

[danish-wani]

@Alkaraawi-Ali-Husham-Shakir

Raising a custom Exception should do the job:

from graphql import GraphQLError

class UpdatePost(graphene.Mutation):
      # owner(added_by)+admin can update and delete
      class Arguments:
            id = graphene.Int(required=True)
            description = graphene.String()
      post = graphene.Field(schema.Posts)
      
      @classmethod
      def mutate(cls, root, info, id, description):
            post = models.Post.objects.get(id=id)
            if (info.context.user == post.added_by):
                  post.description = description
                  post.save()
                  return CreatePost(post=post)
            else:
                 raise GraphQLError("Only the owner of the post and the admin(website's owner) can edit and delete this post")