Is it possible to select fields and relationships for each type within a UnionType?

[zabavnikov]

Query:

{
  timeline {
    ... on Note {
      id
    }
    ... on Travel {
      id
      user_id
      user {
        id
      }
    }
  }
}

Result:

Rebing\GraphQL\Support\SelectFields {#1382
  #select: array:1 [
    0 => "*"
  ]
  #relations: []
}

TimelineUnion

class TimelineUnion extends UnionType
{
    protected $attributes = [
        'name' => 'TimelineUnion',
    ];

    public function types(): array
    {
        return [
            GraphQL::type('Note'),
            GraphQL::type('Question'),
            GraphQL::type('Review'),
            GraphQL::type('Travel'),
            GraphQL::type('Album'),
        ];
    }

    public function resolveType($value): Type|null
    {
        if ($value instanceof Note) {
            return GraphQL::type('Note');
        } else if ($value instanceof Question) {
            return GraphQL::type('Question');
        } else if ($value instanceof Review) {
            return GraphQL::type('Review');
        } else if ($value instanceof Travel) {
            return GraphQL::type('Travel');
        } else if ($value instanceof Album) {
            return GraphQL::type('Album');
        }

        return null;
    }
}

TimelineQuery

class TimelineQuery extends Query
{
    protected $attributes = [
        'name' => 'Timeline',
    ];

    public function type(): Type
    {
        return Type::listOf(GraphQL::type('TimelineUnion'));
    }

    public function resolve($root, $args, $context, ResolveInfo $resolveInfo, Closure $getSelectFields)
    {
        dd($getSelectFields());
    }
}

[crissi]

not yet. I have been looking a bit into it. is this a morph relationship?

[zabavnikov]

@crissi, no, this is not a morph relationship. Each model is selected separately, and then merged into a single collection.