@Arg parameter decorators in inherited Resolver do not produce any arguments in GraphQl schema.

[altitudems]

Describe the bug
@Arg parameter decorators in inherited Resolver do not produce any arguments in GraphQl schema.

To Reproduce
Create a simple resolver that inherits from a base resolver, following closely the documentation here: https://typegraphql.ml/docs/0.16.0/interfaces-and-inheritance.html.

Example:

import { Resolver, ClassType, Query, Arg, Int, ObjectType, Field } from 'type-graphql'

export function createBaseResolver<T extends ClassType>(classType: ClassType) {
  const suffix = classType.name

  @Resolver({ isAbstract: true })
  abstract class BaseResolver {
    protected items: T[] = []

    @Query(type => classType, { name: `multiply${suffix}` })
    public async multiply(@Arg('a', type => Int) a: number, @Arg('b', type => Int) b: number) {
      let instance = new classType()
      instance.value = a * b
      return instance
    }
  }

  return BaseResolver
}

@ObjectType()
class MyResource {
  @Field()
  public value: number
}

const MyResourceBaseResolver = createBaseResolver(MyResource)

@Resolver(of => MyResource)
export class StoryResolver extends MyResourceBaseResolver {}

Resulting schema:

type Query {
  multiplymyresource: MyResource!
  # Notice the missing arguments a and b
}

Expected behavior
Query or Mutation arguments represented by an @Arg decorator to appear in generated schema.

Logs
N/A

Environment (please complete the following information):

• OS: OSX
• Node 10.16.0
• Package version 0.17.5
• TypeScript version 3.5.1

Additional context
N/A

[MichalLytek]

Cannot reproduce:

async function main() {
  const schema = await buildSchema({
    resolvers: [StoryResolver],
  });
  console.log(printSchema(schema));
}

main();

type MyResource {
  value: Float!
}

type Query {
  multiplyMyResource(b: Int!, a: Int!): MyResource!     
}

I bet you (or your environment like lambda) are using babel which has legacy decorators plugin that doesn't support method parameters decorators, so they are stripped of and args are not registered. See #55 for more info.

[altitudems]

Thanks for the feedback. I'll look for that and report back.

[MichalLytek]

Closing for a housekeeping purposes 🔒

[ryanmargono]

@altitudems did you end up solving this?