django/tests/model_package/tests.py

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from django.db import connection, models
from django.db.backends.utils import truncate_name
from django.test import TestCase
from .models.article import Article, Site
from .models.publication import Publication
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class Advertisement(models.Model):
customer = models.CharField(max_length=100)
publications = models.ManyToManyField("model_package.Publication", blank=True)
class ModelPackageTests(TestCase):
def test_m2m_tables_in_subpackage_models(self):
"""
Regression for #12168: models split into subpackages still get M2M
tables.
"""
p = Publication.objects.create(title="FooBar")
site = Site.objects.create(name="example.com")
a = Article.objects.create(headline="a foo headline")
a.publications.add(p)
a.sites.add(site)
a = Article.objects.get(id=a.pk)
self.assertEqual(a.id, a.pk)
self.assertEqual(a.sites.count(), 1)
def test_models_in_the_test_package(self):
"""
Regression for #12245 - Models can exist in the test package, too.
"""
p = Publication.objects.create(title="FooBar")
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ad = Advertisement.objects.create(customer="Lawrence Journal-World")
ad.publications.add(p)
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ad = Advertisement.objects.get(id=ad.pk)
self.assertEqual(ad.publications.count(), 1)
def test_automatic_m2m_column_names(self):
"""
Regression for #12386 - field names on the autogenerated intermediate
class that are specified as dotted strings don't retain any path
component for the field or column name.
"""
self.assertEqual(
Article.publications.through._meta.fields[1].name, 'article'
)
self.assertEqual(
Article.publications.through._meta.fields[1].get_attname_column(),
('article_id', 'article_id')
)
self.assertEqual(
Article.publications.through._meta.fields[2].name, 'publication'
)
self.assertEqual(
Article.publications.through._meta.fields[2].get_attname_column(),
('publication_id', 'publication_id')
)
self.assertEqual(
Article._meta.get_field('publications').m2m_db_table(),
truncate_name('model_package_article_publications', connection.ops.max_name_length()),
)
self.assertEqual(
Article._meta.get_field('publications').m2m_column_name(), 'article_id'
)
self.assertEqual(
Article._meta.get_field('publications').m2m_reverse_name(),
'publication_id'
)