Type-graphql: Failure while deserializing an input type with a nested array field

[pablojmp]

Describe the Bug
While trying to pass an input with a nested array field, the object comes up empty on the resolver

To Reproduce

@ObjectType()
@InputType('InnerInput')
export class Inner {
  @Field((type) => String)
  aString: string

  @Field((type) => Int)
  aNumber: number
}

@InputType()
export class Outer {
  @Field((type) => [[Inner]])
  nested: Inner[][]
}



md5-51b8bceea54167a15a848aa646ac3e53



@Resolver()
export class TestResolver {
  @Query((type) => Inner)
  test(@Arg('input', (type) => Outer) input: Outer) {
    return input[0][0].nested
  }
}



md5-aa2ce18a929323f4ba221075d257cdb2



{
  test(input: {nested: [[{aString: "test", aNumber: 90}]]}) {
    aString
    aNumber
  }
}

Expected Behavior
The query should return the object {aString: "test", aNumber: 90}. Instead, it returns the error "Cannot read property '0' of undefined"

Environment (please complete the following information):

• OS: Windows 10 build 19042.844
• Node 14.15.5
• Package version 1.1.1
• TypeScript version 4.2.2

[MichalLytek]

@pablojmp Sorry but unable to reproduce:
https://github.com/MichalLytek/type-graphql/blob/v1.1.1/tests/functional/resolvers.ts#L1414-L1420
https://github.com/MichalLytek/type-graphql/blob/v1.1.1/tests/functional/resolvers.ts#L1767-L1787

Please create a PR with a failing test case 😉

[pablojmp]

Yes, I know the nested array on Arg passed, but this is not the same:

@Arg('input', (type) => Outer)

this is a nested array inside the InputType decorated class
vs

@Arg("inputs", type => [[[SampleInput]]])

here the input is a nested array

[pablojmp]

I'll create a test case shortly

[MichalLytek]

Thanks 😉

[pablojmp]

here: https://github.com/MichalLytek/type-graphql/pull/802

[MichalLytek]

Fixed by f9499e2 🔒

[pablojmp]

thanks for the quick fix @MichalLytek!