Problems making updates to the schema

[axelhzf]

I have a simple schema like this

const Query = queryType({
  definition(t) {
    t.field("user", {
      type: User,
      nullable: false,
      resolve() {
        return null;
      }
    });
  }
});

And this give the following error because of the nullable

$ ts-node-dev src/index.ts
Using ts-node version 8.0.2, typescript version 3.3.3
[ERROR] 12:02:47 ⨯ Unable to compile TypeScript:
src/index.ts(26,7): error TS2322: Type '() => null' is not assignable to type 'FieldResolver<"Query", "user">'.
  Type 'null' is not assignable to type 'MaybePromise<{ id: MaybePromise<string>; name: MaybePromise<string>; }>'.

The problem is that when I update to nullable: true I still get the same error.
It looks like it is getting the old generated types because it cannot run the server to generate the new types.

[tgriesser]

If you run with --transpileOnly option it will start the server even with type errors which will then allow it to generate the correct types.

Probably need to add this to the docs/faq since this has come up a few times.

[axelhzf]

The downside about --transpileOnly transpile only is that it won't detect any errors.

Maybe I could setup an initial step to generate the schema using --transpileOnly and then run the application with error detection enabled.

[tgriesser]

Generally my workflow when developing is to have two processes running via gulp or similar, one starting/reloading the server with transpile only, one checking for errors.

Then in CI I’ll only have the tsc run so it catches any errors.

[axelhzf]

Ok, that makes sense. Thanks!