def test_empty_update_fields(self):
s = Person.objects.create(name='Sara', gender='F')
pre_save_data = []
def pre_save_receiver(**kwargs):
pre_save_data.append(kwargs['update_fields'])
pre_save.connect(pre_save_receiver)
post_save_data = []
def post_save_receiver(**kwargs):
post_save_data.append(kwargs['update_fields'])
post_save.connect(post_save_receiver)
# Save is skipped.
with self.assertNumQueries(0):
s.save(update_fields=[])
# Signals were skipped, too...
self.assertEqual(len(pre_save_data), 0)
self.assertEqual(len(post_save_data), 0)
def test_update_fields_signals(self):
p = Person.objects.create(name='Sara', gender='F')
pre_save_data = []
def pre_save_receiver(**kwargs):
pre_save_data.append(kwargs['update_fields'])
pre_save.connect(pre_save_receiver)
post_save_data = []
def post_save_receiver(**kwargs):
post_save_data.append(kwargs['update_fields'])
post_save.connect(post_save_receiver)
p.save(update_fields=['name'])
self.assertEqual(len(pre_save_data), 1)
self.assertEqual(len(pre_save_data[0]), 1)
self.assertTrue('name' in pre_save_data[0])
self.assertEqual(len(post_save_data), 1)
self.assertEqual(len(post_save_data[0]), 1)
self.assertTrue('name' in post_save_data[0])