update docs where is mentioned. Added extra tests for pre_save behaviour.

This commit is contained in:
Marko Tibold 2012-12-13 22:57:35 +01:00
parent 497da7fc69
commit cf81ba8afb
2 changed files with 37 additions and 2 deletions

View File

@ -96,7 +96,11 @@ Now that snippets are associated with the user that created them, let's update o
owner = serializers.Field(source='owner.username')
**Note**: Make sure you also add `'owner',` to the list of fields in the inner `Meta` class.
**Note**: Make sure you also add `'owner',` to the list of excluded fields in the inner `Meta` class, like so:
exclude = ('owner', )
This makes the owner field not required, which is correct, because we set it in our `pre_save()` method.
This field is doing something quite interesting. The `source` argument controls which attribute is used to populate a field, and can point at any attribute on the serialized instance. It can also take the dotted notation shown above, in which case it will traverse the given attributes, in a similar way as it is used with Django's template language.

View File

@ -301,3 +301,34 @@ class TestCreateModelWithAutoNowAddField(TestCase):
self.assertEquals(response.status_code, status.HTTP_201_CREATED)
created = self.objects.get(id=1)
self.assertEquals(created.content, 'foobar')
class CommentSerializer(serializers.ModelSerializer):
class Meta:
model = Comment
exclude = ('created', 'email')
class ViewUsingPreSave(generics.CreateAPIView):
serializer_class = CommentSerializer
model = Comment
def pre_save(self, obj):
obj.email = 'overriden@address.com'
class TestPreSave(TestCase):
def setUp(self):
self.view = ViewUsingPreSave.as_view()
def test_pre_save_gets_called(self):
"""
The email address is set at pre_save time.
"""
content = {'content': 'some content'}
request = factory.post('/', json.dumps(content),
content_type='application/json')
response = self.view(request).render()
self.assertEquals(response.status_code, status.HTTP_201_CREATED)
self.assertEquals(Comment.objects.get(pk=1).email, 'overriden@address.com')