Can't I use .values() with relationships?

Take the following example :

class Task(Model):
  title = fields.CharField(255)

class Actions(Model):
  title = fields.CharField(255)
  task = fields.ManyToManyField('models.Task', related_name='actions')

async def main():
  tasks = await Task.all().prefetch_related('actions').values('actions')

I’m trying to achieve the following structure:

[
    {
        "id" : 1,
        "title" : "Task 1",
        "actions" : [
            {
                "id" : 1,
                "title" : "Action 1"
            }
        ]
    }
]

But it gives me Selecting relation "actions" is not possible, select concrete field on related model

Is this intended? Do I need to use a serializer to be able to achieve this structure?

How would I choose to return only specific fields from actions if not using values?

[grigi]

Could we not make it use kwargs? E.g. values(‘name’, childs=Childs.all().values(…)) ? And if you pass a queryset it would auto prefetch?

This would implement a useable deserialisation step 🤔 And be performant

(Generally in favour)

[abondar]

I have idea that it would be quite neat to have such api

ojb.values('name', Prefetch("childs", queryset=Child.all().values('id', 'name')))

That would result in such dict

[{
  'name': 'Res 1',
  'childs': [{
    'id': 1,
    'name': 'John'
  }]
}]

@grigi What do you think about such design?