django/tests/m2m_multiple/tests.py

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from __future__ import unicode_literals
from datetime import datetime
from django.test import TestCase
from .models import Article, Category
class M2MMultipleTests(TestCase):
def test_multiple(self):
c1, c2, c3, c4 = [
Category.objects.create(name=name)
for name in ["Sports", "News", "Crime", "Life"]
]
a1 = Article.objects.create(
headline="Parrot steals", pub_date=datetime(2005, 11, 27)
)
a1.primary_categories.add(c2, c3)
a1.secondary_categories.add(c4)
a2 = Article.objects.create(
headline="Parrot runs", pub_date=datetime(2005, 11, 28)
)
a2.primary_categories.add(c1, c2)
a2.secondary_categories.add(c4)
self.assertQuerysetEqual(
a1.primary_categories.all(), [
"Crime",
"News",
],
lambda c: c.name
)
self.assertQuerysetEqual(
a2.primary_categories.all(), [
"News",
"Sports",
],
lambda c: c.name
)
self.assertQuerysetEqual(
a1.secondary_categories.all(), [
"Life",
],
lambda c: c.name
)
self.assertQuerysetEqual(
c1.primary_article_set.all(), [
"Parrot runs",
],
lambda a: a.headline
)
self.assertQuerysetEqual(
c1.secondary_article_set.all(), []
)
self.assertQuerysetEqual(
c2.primary_article_set.all(), [
"Parrot steals",
"Parrot runs",
],
lambda a: a.headline
)
self.assertQuerysetEqual(
c2.secondary_article_set.all(), []
)
self.assertQuerysetEqual(
c3.primary_article_set.all(), [
"Parrot steals",
],
lambda a: a.headline
)
self.assertQuerysetEqual(
c3.secondary_article_set.all(), []
)
self.assertQuerysetEqual(
c4.primary_article_set.all(), []
)
self.assertQuerysetEqual(
c4.secondary_article_set.all(), [
"Parrot steals",
"Parrot runs",
],
lambda a: a.headline
)