Merge pull request #769 from oinopion/ticket19816

            raise AttributeError("Cannot set values on a ManyToManyField which specifies an intermediary model.  Use %s.%s's Manager instead." % (opts.app_label, opts.object_name))

        manager = self.__get__(instance)

        # clear() can change expected output of 'value' queryset, we force evaluation

        # of queryset before clear; ticket #19816

        value = tuple(value)

        manager.clear()

        manager.add(*value)

from django.utils import six

from .models import (SelfRefer, Tag, TagCollection, Entry, SelfReferChild,

    SelfReferChildSibling, Worksheet, RegressionModelSplit)

    SelfReferChildSibling, Worksheet, RegressionModelSplit, Line)

class M2MRegressionTests(TestCase):

        # causes a TypeError in add_lazy_relation

        m1 = RegressionModelSplit(name='1')

        m1.save()

    def test_m2m_filter(self):

        worksheet = Worksheet.objects.create(id=1)

        line_hi = Line.objects.create(name="hi")

        line_bye = Line.objects.create(name="bye")

        worksheet.lines = [line_hi, line_bye]

        hi = worksheet.lines.filter(name="hi")

        worksheet.lines = hi

        self.assertEquals(1, worksheet.lines.count())

        self.assertEquals(1, hi.count())