Adding annotations to all querysets with a custom QuerySet as Manager

Question

I\'m not sure how to put words on this precisely, but what I\'m trying to do is use a custom QuerySet for a model, but I want to annotate the results of any queryset. So whe

Answer 1

You should use the from_queryset method - it allows you to create a Manager class which you can further customise before applying to your model. For example:

class CustomQuerySet(models.QuerySet):
    def most_liked(self):
        return self.filter(...)


class CustomManager(models.Manager.from_queryset(CustomQuerySet)):
    def get_queryset(self):
        return super(CustomManager, self).get_queryset() \
            .annotate(...)


class Model(models.Model):
    objects = CustomManager()