def test_serializer_propagation_consistency(self):
s = CatSerializer(request_fields={'home': True})
# In version <= 1.3.7 these will have returned different values.
r1 = s.get_all_fields()['home'].serializer.id_only()
r2 = s.fields['home'].serializer.id_only()
r3 = s.get_all_fields()['home'].serializer.id_only()
self.assertEqual(r1, r2)
self.assertEqual(r2, r3)
def test_serializer_propagation_consistency(self):
s = CatSerializer(
request_fields={'home': True}
)
# In version <= 1.3.7 these will have returned different values.
r1 = s.get_all_fields()['home'].serializer.id_only()
r2 = s.fields['home'].serializer.id_only()
r3 = s.get_all_fields()['home'].serializer.id_only()
self.assertEqual(r1, r2)
self.assertEqual(r2, r3)
def test_root_serializer_trickledown_request_fields(self):
s = CatSerializer(request_fields=True)
self.assertIsNotNone(s.get_all_fields()['home'].serializer)
class TestSerializerCaching(TestCase):
def setUp(self):
self.serializer = CatSerializer(request_fields={
'home': {},
'backup_home': True
})
def test_get_all_fields(self):
all_fields = self.serializer.get_all_fields()
# These are two different instances of the field object
# because get_all_fields() does a copy().
home_field_1 = self.serializer.fields['home']
home_field_2 = all_fields['home']
'''
# Expected with fields cache
self.assertNotEqual(
home_field_1,
home_field_2,
'Expected different field instances, got same.'
)
'''
self.assertEqual(home_field_1.serializer, home_field_2.serializer,
'Expected same serializer instance, got different.')
def test_serializer_args_busts_cache(self):
home_field = self.serializer.fields['home']
self.assertIsNot(home_field.get_serializer(),
home_field.get_serializer('foo'),
('Passing arg to get_serializer should construct new'
' serializer. Instead got same one.'))
def test_same_serializer_class_different_fields(self):
# These two use the same serializer class, but are different
# fields, so they should use different serializer instances.
home_field = self.serializer.fields['home']
backup_home_field = self.serializer.fields['backup_home']
self.assertIsNot(
home_field.serializer, backup_home_field.serializer,
('Different fields that use same serializer should get',
' separate serializer instances.'))
def test_different_roots(self):
serializer2 = CatSerializer(request_fields={
'home': {},
'backup_home': {}
})
home1 = self.serializer.fields['home']
home2 = serializer2.fields['home']
self.assertIsNot(
home1.serializer, home2.serializer,
'Different root serializers should yield different instances.')
@unittest.skip(
"skipping because DRF's Field.root doesn't have cycle-detection.")
def test_root_serializer_cycle_busting(self):
s = CatSerializer(request_fields={'home': {}, 'backup_home': {}})
s.parent = s # Create cycle.
self.assertIsNone(s.fields['home'].root_serializer)
def test_root_serializer_trickledown_request_fields(self):
s = CatSerializer(request_fields=True)
self.assertIsNotNone(s.get_all_fields()['home'].serializer)
def test_recursive_serializer(self):
s = LocationSerializer(
request_fields={'cats': {
'parent': {
'parent': True
}
}})
cats_field = s.get_all_fields()['cats']
l1 = cats_field.serializer.child # .child because list
l2 = l1.get_all_fields()['parent'].serializer
l3 = l2.get_all_fields()['parent'].serializer
l4 = l3.get_all_fields()['parent'].serializer
self.assertIsNot(l2, l3)
# l3 and l4 should be same cached instance because both have
# request_fields=True (l3 by inheritence, l4 by default)
self.assertIs(l3, l4)
def test_root_serializer_trickledown_request_fields(self):
s = CatSerializer(
request_fields=True
)
self.assertIsNotNone(s.get_all_fields()['home'].serializer)
class TestSerializerCaching(TestCase):
def setUp(self):
self.serializer = CatSerializer(
request_fields={'home': {}, 'backup_home': True}
)
def test_get_all_fields(self):
all_fields = self.serializer.get_all_fields()
# These are two different instances of the field object
# because get_all_fields() does a copy().
home_field_1 = self.serializer.fields['home']
home_field_2 = all_fields['home']
self.assertNotEqual(
home_field_1,
home_field_2,
'Expected different field instances, got same.'
)
self.assertEqual(
home_field_1.serializer,
home_field_2.serializer,
'Expected same serializer instance, got different.'
)
def test_serializer_args_busts_cache(self):
home_field = self.serializer.fields['home']
self.assertIsNot(
home_field.get_serializer(),
home_field.get_serializer('foo'),
(
'Passing arg to get_serializer should construct new'
' serializer. Instead got same one.'
)
)
def test_same_serializer_class_different_fields(self):
# These two use the same serializer class, but are different
# fields, so they should use different serializer instances.
home_field = self.serializer.fields['home']
backup_home_field = self.serializer.fields['backup_home']
self.assertIsNot(
home_field.serializer,
backup_home_field.serializer,
(
'Different fields that use same serializer should get',
' separate serializer instances.'
)
)
def test_different_roots(self):
serializer2 = CatSerializer(
request_fields={'home': {}, 'backup_home': {}}
)
home1 = self.serializer.fields['home']
home2 = serializer2.fields['home']
self.assertIsNot(
home1.serializer,
home2.serializer,
'Different root serializers should yield different instances.'
)
def test_root_serializer_cycle_busting(self):
s = CatSerializer(
request_fields={'home': {}, 'backup_home': {}}
)
s.parent = s # Create cycle.
self.assertIsNone(s.fields['home'].root_serializer)
def test_root_serializer_trickledown_request_fields(self):
s = CatSerializer(
request_fields=True
)
self.assertIsNotNone(s.get_all_fields()['home'].serializer)
def test_recursive_serializer(self):
s = LocationSerializer(
request_fields={
'cats': {
'parent': {
'parent': True
}
}
}
)
cats_field = s.get_all_fields()['cats']
l1 = cats_field.serializer.child # .child because list
l2 = l1.get_all_fields()['parent'].serializer
l3 = l2.get_all_fields()['parent'].serializer
l4 = l3.get_all_fields()['parent'].serializer
self.assertIsNot(l2, l3)
# l3 and l4 should be same cached instance because both have
# request_fields=True (l3 by inheritence, l4 by default)
self.assertIs(l3, l4)