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from __future__ import unicode_literals
import os
import sys
from django.core.apps import app_cache
from django.core.management import call_command
from django.test import TestCase, TransactionTestCase
from django.utils._os import upath
from .models import (ConcreteModel, ConcreteModelSubclass,
ConcreteModelSubclassProxy)
class ProxyModelInheritanceTests(TransactionTestCase):
"""
Proxy model inheritance across apps can result in migrate not creating the table
for the proxied model (as described in #12286). This test creates two dummy
apps and calls migrate, then verifies that the table has been created.
"""
available_apps = []
def setUp(self):
self.old_sys_path = sys.path[:]
sys.path.append(os.path.dirname(os.path.abspath(upath(__file__))))
def tearDown(self):
sys.path = self.old_sys_path
def test_table_exists(self):
with app_cache._with_app('app1'), app_cache._with_app('app2'):
call_command('migrate', verbosity=0)
from .app1.models import ProxyModel
from .app2.models import NiceModel
self.assertEqual(NiceModel.objects.all().count(), 0)
self.assertEqual(ProxyModel.objects.all().count(), 0)
class MultiTableInheritanceProxyTest(TestCase):
def test_model_subclass_proxy(self):
"""
Deleting an instance of a model proxying a multi-table inherited
subclass should cascade delete down the whole inheritance chain (see
#18083).
"""
instance = ConcreteModelSubclassProxy.objects.create()
instance.delete()
self.assertEqual(0, ConcreteModelSubclassProxy.objects.count())
self.assertEqual(0, ConcreteModelSubclass.objects.count())
self.assertEqual(0, ConcreteModel.objects.count())
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