def test_transaction_now(self):
"""
The test case puts everything under a transaction, so two models
updated with a short gap should have the same time.
"""
m1 = NowTestModel.objects.create()
m2 = NowTestModel.objects.create()
NowTestModel.objects.filter(id=m1.id).update(when=TransactionNow())
sleep(0.1)
NowTestModel.objects.filter(id=m2.id).update(when=TransactionNow())
m1.refresh_from_db()
m2.refresh_from_db()
self.assertIsInstance(m1.when, datetime)
self.assertEqual(m1.when, m2.when)
def test_transaction_now(self):
"""
Checks that queries with a TransactionNow() parameter are not cached.
"""
obj = Test.objects.create(datetime='1992-07-02T12:00:00')
qs = Test.objects.filter(datetime__lte=TransactionNow())
with self.assertRaises(UncachableQuery):
self.assert_tables(qs, Test)
self.assert_query_cached(qs, [obj], after=1)
def test_transaction_now(self):
"""
Checks that queries with a TransactionNow() parameter are not cached.
"""
obj = Test.objects.create(datetime='1992-07-02T12:00:00')
qs = Test.objects.filter(datetime__lte=TransactionNow())
with self.assertNumQueries(1):
obj1 = qs.get()
with self.assertNumQueries(1):
obj2 = qs.get()
self.assertEqual(obj1, obj2)
self.assertEqual(obj1, obj)