resolveType on unions and itnerface from type-graphql ignored when using code first approach

[vnenkpet]

Describe the bug
When I try defining a resolveType function on createUnionType, it compiles succesfully but I'm getting this warning:

Type "MyUnionType" is missing a "__resolveType" resolver. Pass false into "resolverValidationOptions.requireResolversForResolveType" to disable this warning.

The type then really isn't working and complains with this:

Abstract type MyUnionType must resolve to an Object type at runtime for field UserType.myUnion (...)

To Reproduce

export const MyUnionType = createUnionType({
  name: 'MyUnionType',
  types: [PersonType, PlaceType],
  resolveType: value => {
    if (value instanceof PersonEntity) {
      return PersonType;
    }
    if (value instanceof PlaceEntity) {
      return PlaceType;
    }
    return undefined;
  },
});

(I didn't test if the resolveType method itself works properly, but that's unrelated to this issue as it's obviously ignored - definitely doesn't get called).

Expected behavior
This should work and resolve into the proper type at runtime.

Enviorment

• OS: MacOS
• Node 12.1.0
• Package version 0.17.3
• TypeScript version 3.4.2
• @nestjs/graphql version 6.0.5

[vnenkpet]

Asked in MichalLytek/type-graphql#326 already, apparently out of their scope so I suppose it belongs here. It's a new feature in type-graphql but I think it would be nice to have it here.

[kamilmysliwiec]

It should be fixed in the @next version ($ npm i @nestjs/graphql@next). You will also have to update @nestjs/core to 6.2.0 ($ npm i @nestjs/core@6.2.0)

[kamilmysliwiec]

Published as 6.2.0 ($ npm i @nestjs/graphql@latest). You will also have to update @nestjs/core to 6.2.0 ($ npm i @nestjs/core@latest)

[pereslavtsev]

@kamilmysliwiec still reproducible, I have latest versions @nestjs/graphql 6.4.3 and type-graphql 0.17.5

[Logic-Bits]

can confirm - CustomFieldConfigUnion doesnt work.
in my case the unionMetadata.classTypes is empty and throws error at buildTypesInfo() in schema-generator.js

[JazzShapka]

resolveType for createUnionType still doesn't work. Are there any other solutions?

[lock]

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