Fixed #13227 -- Ensure that the query cache is flushed when a QuerySet is...

        """

        Deep copy of a QuerySet doesn't populate the cache

        """

        obj_dict = deepcopy(self.__dict__, memo)

        obj_dict['_iter'] = None

        obj = self.__class__()

        obj.__dict__.update(obj_dict)

        for k,v in self.__dict__.items():

            if k in ('_iter','_result_cache'):

                obj.__dict__[k] = None

            else:

                obj.__dict__[k] = deepcopy(v, memo)

        return obj

    def __getstate__(self):

from django.db.models import Count

from django.test import TestCase

from models import Tag, Annotation, DumbCategory

from models import Tag, Annotation, DumbCategory, Note, ExtraInfo

class QuerysetOrderedTests(unittest.TestCase):

    """

            # This prevents us from even evaluating this test case at all.

            # Refs #10099

            self.assertFalse(connections[DEFAULT_DB_ALIAS].features.allow_sliced_subqueries)

class CloneTests(TestCase):

    def test_evaluated_queryset_as_argument(self):

        "#13227 -- If a queryset is already evaluated, it can still be used as a query arg"

        n = Note(note='Test1', misc='misc')

        n.save()

        e = ExtraInfo(info='good', note=n)

        e.save()

        n_list = Note.objects.all()

        # Evaluate the Note queryset, populating the query cache

        list(n_list)

        # Use the note queryset in a query, and evalute

        # that query in a way that involves cloning.

        try:

            self.assertEquals(ExtraInfo.objects.filter(note__in=n_list)[0].info, 'good')

        except:

            self.fail('Query should be clonable')