get_dynamic_class_hook() not invoked on generic types

[mkurnikov]

In Django, there's a method called as_manager() on QuerySet
https://docs.djangoproject.com/en/3.0/ref/models/querysets/#django.db.models.query.QuerySet.as_manager
which returns an instance of a dynamically created manager with callee QuerySet method copied inside

class AnonymousManager(models.Manager):
    ... methods of QuerySet callee copied ...

I'd like to be able to call it like with generic parameters

MyQuerySet[MyModel].as_manager()

Now, because of clause

            if isinstance(callee_expr, RefExpr) and callee_expr.fullname:
                method_name = call.callee.name
                fname = callee_expr.fullname + '.' + method_name

get_dynamic_class_hook() never called. callee_expr is TypeApplication here, not RefExpr.

[msullivan]

I'd be happy to review a PR if you send one!

[flaeppe]

@sobolevn Seems that what I also discovered here typeddjango/django-stubs#1683 (comment) is already reported

[sobolevn]

@flaeppe do you want to contribute? :)
I would be happy to merge this feature, since it is affecting us for like 3 years now.

[flaeppe]

Yeah, sure, I'll have a look as soon as I get some time