Custom Page Manager from queryset not working

I can’t make things work just using the sample code in the guide here

Please note there is an error in the sample code: there is a missing “()” at the end of this lineobjects = PageManager.from_queryset(EventPageQuerySet)

I initially had the problem while working with wagtail_modeltranslation (see more at infoportugal/wagtail-modeltranslation#95). I couldn’t find the problem, so I thought it may be not related to that thirdy-app. I finally restarted from zero with the sample, but I see I get this traceback:

Traceback (most recent call last):
    EventPage.objects.future()
  File "C:\xxxxxxxxxxx\Lib\site-packages\django\db\models\manager.py", line 127, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
AttributeError: 'PageQuerySet' object has no attribute 'future'

• Python version: 2.7
• Django version: 1.8.x
• Wagtail version: 1.7

[gasman]

I can confirm that the EventPageQuerySet example doesn’t currently work as written, because BasePageManager in wagtailcore.models has a hard-coded reference to PageQuerySet - I’ve now opened #3557 to fix this.

[thornycrackers]

I also ran into this problem and solved it by overriding the get_queryset function on a custom Manager.

Edit: Python3 Django 1.10 Wagtail 1.9