Is there a django style model manager?

[simkimsia]

i like how your docs cover python and django style for queries. https://collerek.github.io/ormar/queries/filter-and-sort/#django-style_5

Well done

Is there a way to have django style model managers using ormar?

Really happy to discover ormar. Thank you

[collerek]

What do you mean by django model managers?

You have "manager" (QuerySet) under objects like in django.
If you want to register a new one you can manually create a QuerySet and assign it to the class, or subclass QuerySet and add your own methods.

[simkimsia]

Yes that's what i mean by "manager"

At present, sometimes i have multiple "managers" for the same model.

Like Book.creators, Book.updators, Book.readers, etc

So I suppose I can define them as per normal like in Django?

[collerek]

I didn't test approach like this, but in general yes - it should work. Under the hood, it's a QuerySet that refers to the Model class and you can create one (or more) yourself.

[simkimsia]

thank you . i will try it out and document what works. thanks for writing ormar

[BlackLIonz]

The only way I found, to add custom functions to a 'Queryset'. You need to override objects method in MetaModel and add it to your model:

class NoteQueryset(QuerySet):
    async def get_or_404(self, *args: Any, **kwargs: Any) -> Optional['Note']:
        try:
            return await self.get(*args, **kwargs)
        except ormar.NoMatch:
            raise HTTPException(status_code=404, detail='Note not found')


class NoteModelMetaclass(ModelMetaclass):
    @property
    def objects(cls: Type["T"]) -> "QuerySet[T]":  # type: ignore
        _ = super().objects
        return NoteQueryset(model_cls=cls)


class Note(Base, metaclass=NoteModelMetaclass):

If you know the better way, pls share it