queries with abstract types in a list return null

[JanEggers]

Is there an existing issue for this?

• I have searched the existing issues

Product

Hot Chocolate

Describe the bug

when having a model with a list of baseclass that is mapped to dtos it returns null.

when orignally encountering the bug graphql will return a list where each object is null.
in the repro i get an error instead: Cannot return null for non-nullable field.

when adding tolist asqueryable in the query type i can see that the data is there

also when doing the same query without the dto conversion is working fine

Steps to reproduce

1. https://github.com/JanEggers/GraphqlRepro

query {
  parents{
    id,
    children{
      id,
      ... on ChildModelA {
        a
      }
      ... on ChildModelB {
        b
      }
    }
  }
  parentDtos{
    id,
    children{
      id,
      ... on ChildDtoA {
        a
      }
    }
  }
}

Relevant log output

No response

Additional Context?

No response

Version

13.0.5

[JanEggers]

here is a screenshot of the orignal issue i encountered

[JanEggers]

after further analysing the issue I think it is related to automapper after all as the provided childdtos are of the baseclass and not the inherited classes