RelationQueryService query should be async

[tonytoth]

Hello guys, One thing I think it would be useful is that the RelationQueryService should support async for virtual relations. At the moment you can't use async response for the query method. e.g:

@QueryService(TodoItemReferenceDTO)
export class TodoItemService extends RelationQueryService<TodoItemReferenceDTO> {
  constructor(@InjectQueryService(SubTaskEntity) readonly subTaskService: QueryService<SubTaskEntity>) {
    super({
      // the name of the relation
      subTasks: {
        service: subTaskService,
        // a query factory that will take in the reference to create a query.
        async query: (todoItemReferenceDTO) => (
            // Do some database request or whatever
            return { filter: { todoItemId: { eq: todoItemReferenceDTO.id } } }
        ),
      },
    });
  }
}

[TriPSs]

Good idea!

Just out of interest: what are you planning to do there that needs async?

[tonytoth]

I was thinking to use this in a virtual relation but I need to touch the database first.