type-graphql: Error when using GraphQLJSON

The latest version (0.15.0) seems to have issues with custom scalars such as the JSON type provided by the GraphQLJSON package (graphql-type-json).

Here is a basic example of what I’d like to do:

import { ObjectType, Field } from "type-graphql";
import GraphQLJSON = require("graphql-type-json");

@ObjectType()
export default class MyData {

    @Field(type => GraphQLJSON)
    public jsonData: any;
}

This results in the following error: “Error: Cannot determine GraphQL input type for jsonData”.

When I go back to the previous version (0.14.0) and GraphQL version 0.13.2, the error disappears and my code works again.

Environment:

OS: Mac, Windows
Node: 10.12.0
Package version: 0.15.0
TypeScript version: 3.1.4

About this issue

Original URL
State: closed
Created 6 years ago
Comments: 18 (8 by maintainers)

Most upvoted comments

@darkmantle

Setting:

  "allowSyntheticDefaultImports": true,
  "esModuleInterop": true,

Means you should use default import:

import GraphQLJSON from "graphql-type-json";

MichalLytek on Feb 1, 2019

No, you need to have only one version of graphql-js in your project, otherwise you will have the “another realm” error.

MichalLytek on Jul 1, 2019

The type instanceof GraphQLScalarType checks also seems to cause issues if you yarn link into another project that has a different version of graphql installed. Would it make sense to use type.constructor.name checks here to guard against this?

goldcaddy77 on Jul 1, 2019

Thanks for your response! After making this change it works 😃.

egges on Nov 2, 2018

According to the code: https://github.com/taion/graphql-type-json/blob/5790abc351b3007dc9dc98ccf35e9ea72ed7ba91/src/index.js#L37

You should do: import GraphQLJSON = require("graphql-type-json").default;

But as I’ve tried in reproduction repo: https://gitlab.com/esindger/tgql-scalar-example

You should do: import * as GraphQLJSON from "graphql-type-json"; instead of: import GraphQLJSON from "graphql-type-json";

Then it works 😃 code_2018-10-31_18-35-48

MichalLytek on Oct 31, 2018