is_list_view() schema util handling of custom viewset actions

[kronion]

I have a viewset with a custom action that I'm generating a schema for. The action is registered as returning a collection rather than a single object, ie the method is decorated with @action(detail=False). I expected this endpoint to be considered a list view during schema generation, but it isn't.

The is_list_view() utility function only considers the viewset action's string name when deciding if an action is a list action:

def is_list_view(path, method, view):
    """
    Return True if the given path/method appears to represent a list view.
    """
    if hasattr(view, 'action'):
        # Viewsets have an explicitly defined action, which we can inspect.
        return view.action == 'list'
    ...

It doesn't consider the value of view.detail.

Is this a bug? Or is there a reason why custom actions should not be considered list views during schema generation?