from django.db.models import Q

from django.test import TestCase

from models import Issue, User

class RelatedObjectTests(TestCase):

    def test_m2m_and_m2o(self):

        r = User.objects.create(username="russell")

        g = User.objects.create(username="gustav")

        i1 = Issue(num=1)

        i1.client = r

        i1.save()

        i2 = Issue(num=2)

        i2.client = r

        i2.save()

        i2.cc.add(r)

        i3 = Issue(num=3)

        i3.client = g

        i3.save()

        i3.cc.add(r)

        self.assertQuerysetEqual(

            Issue.objects.filter(client=r.id), [

                1,

                2,

            ],

            lambda i: i.num

        )

        self.assertQuerysetEqual(

            Issue.objects.filter(client=g.id), [

                3,

            ],

            lambda i: i.num

        )

        self.assertQuerysetEqual(

            Issue.objects.filter(cc__id__exact=g.id), []

        )

        self.assertQuerysetEqual(

            Issue.objects.filter(cc__id__exact=r.id), [

                2,

                3,

            ],

            lambda i: i.num

        )

        # These queries combine results from the m2m and the m2o relationships.

        # They're three ways of saying the same thing.

        self.assertQuerysetEqual(

            Issue.objects.filter(Q(cc__id__exact = r.id) | Q(client=r.id)), [

                1,

                2,

                3,

            ],

            lambda i: i.num

        )

        self.assertQuerysetEqual(

            Issue.objects.filter(cc__id__exact=r.id) | Issue.objects.filter(client=r.id), [

                1,

                2,

                3,

            ],

            lambda i: i.num

        )

        self.assertQuerysetEqual(

            Issue.objects.filter(Q(client=r.id) | Q(cc__id__exact=r.id)), [

                1,

                2,

                3,

            ],

            lambda i: i.num

        )