django-model-utils/model_utils/managers.py

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from django.db import models
class QueryManager(models.Manager):
def __init__(self, *args, **kwargs):
if args:
self._q = args[0]
else:
self._q = models.Q(**kwargs)
super(QueryManager, self).__init__()
def order_by(self, *args):
self._order_by = args
return self
def get_query_set(self):
qs = super(QueryManager, self).get_query_set().filter(self._q)
if hasattr(self, '_order_by'):
return qs.order_by(*self._order_by)
return qs