QuerySetManager

base.managers.py

class QuerySetManager(models.Manager):
	
	def get_query_set(self):
		return self.QuerySet(self.model)
	
	def __getattr__(self, attr, *args):
		return getattr(self.get_query_set(), attr, *args)

jetpack.managers.py

class PackagesManager(QuerySetManager):
	
	class QuerySet(QuerySet):
		
		def active(self):
			pass
		
		def addons(self):
			pass
		
		def libraries(self):
			pass
		
		def recently_active(self):
			pass

jetpack.views.py

Package.objects.active().libraries().recently_active().filter(author=1)

would filter by author before recently active make the last one quicker?

possibly. that is up to how Django executes QuerySets. basically, this just easily adds the methods we add to the manager to be chainable from the QuerySet as well.