Fails if I extend GraphQLObjectType

[Wyctus]

Description

If I create a GraphQL type the following way, then everything works as expected:

const Author: GraphQLObjectType = new GraphQLObjectType({
        name: 'Author',
        extensions: {
            joinMonster: {
                sqlTable: 'authors',
                uniqueKey: 'id',
            }
        },
        fields: () => ({
            id: {
                type: GraphQLInt
            },
            user: {
                type: GraphQLInt
            },
            name: {
                type: GraphQLString
            },
            profile_photo: {
                type: GraphQLInt
            },
            description: {
                type: GraphQLString
            }
        })
});

But for some specific reason, I have to extend the GraphQLObjectType type to abstact away a couple of things:

class Model extends GraphQLObjectType {
    constructor() {
        super({
            name: 'Author',
            extensions: {
                joinMonster: {
                    sqlTable: 'authors',
                    uniqueKey: 'id',
                }
            },
            fields: () => ({
                id: {
                    type: GraphQLInt
                },
                user: {
                    type: GraphQLInt
                },
                name: {
                    type: GraphQLString
                },
                profile_photo: {
                    type: GraphQLInt
                },
                description: {
                    type: GraphQLString,
                }
            })
        });
    }
}

Now if I use the new Model class instead of the GraphQLObjectType then join-monster fails, since it relies on the constructor.name to recognize tables, as you can see here.
But in my case, due to extending the class, constructor.name becomes Model, so it wont recognize it as GraphQLObjectType anymore.

A possible solution is to check if the parent is a GraphQLObjectType by something like: Object.getPrototypeOf(instance.constructor) === GraphQLObjectType.
(But this should be done recursively, to support multilevel inheritance.)

Is there any workaround which can help in my usecase?

Environment

• Version of this library used: 3.0.1

[nicoabie]

Can you file a https://github.com/join-monster/join-monster-sscce ?

[nicoabie]

You can do it like this graphql/graphql-js#3266