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Start separating out serializers

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This commit is contained in:
Tom Christie 2012-01-06 13:26:21 +00:00
parent 6305033373
commit d1c217523b
5 changed files with 104 additions and 108 deletions
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56
djangorestframework/mixins.py
View File

@ -8,7 +8,7 @@ from django.core.paginator import Paginator
from django.http import HttpResponse
from djangorestframework import status
from djangorestframework.resources import Resource, FormResource, ModelResource
from djangorestframework.resources import Resource
from djangorestframework.response import Response, ErrorResponse
from djangorestframework.utils import MSIE_USER_AGENT_REGEX
from djangorestframework.utils.mediatypes import is_form_media_type, order_by_precedence
@ -395,24 +395,39 @@ class AuthMixin(object):
class SerializerMixin(object):
def validate_request(self, data, files=None):
serializer_class = None
deserializer_class = None
@property
def serializer(self):
if not hasattr(self, '_serializer'):
self._serializer = self.resource_class(view=self)
return self._serializer
@property
def deserializer(self):
if not hasattr(self, '_deserializer'):
self._deserializer = self.resource_class(view=self)
return self._deserializer
def deserialize(self, data, files=None):
"""
Given the request *data* and optional *files*, return the cleaned,
validated content.
May raise an :class:`response.ErrorResponse` with status code 400
(Bad Request) on failure.
"""
return self.resource.validate_request(data, files)
return self.deserializer.deserialize(data, files)
def filter_response(self, obj):
def serialize(self, obj):
"""
Given the response content, filter it into a serializable object.
"""
return self.resource.filter_response(obj)
return self.serializer.serialize(obj)
def get_bound_form(self, content=None, method=None):
if hasattr(self.resource, 'get_bound_form'):
return self.resource.get_bound_form(content, method=method)
if hasattr(self.deserializer, 'get_bound_form'):
return self.deserializer.get_bound_form(content, method=method)
else:
return None
@ -432,7 +447,7 @@ class ResourceMixin(object):
and filters the object representation into a serializable object for the
response.
"""
resource_class = None
resource_class = Resource
@property
def CONTENT(self):
@ -443,7 +458,7 @@ class ResourceMixin(object):
(Bad Request).
"""
if not hasattr(self, '_content'):
self._content = self.validate_request(self.DATA, self.FILES)
self._content = self.deserialize(self.DATA, self.FILES)
return self._content
@property
@ -454,25 +469,12 @@ class ResourceMixin(object):
May raise an :class:`response.ErrorResponse` with status code 400
(Bad Request).
"""
return self.validate_request(self.request.GET)
def get_resource_class(self):
if self.resource_class:
return self.resource_class
elif getattr(self, 'model', None):
return ModelResource
elif getattr(self, 'form', None):
return FormResource
elif hasattr(self, 'request') and getattr(self, '%s_form' % self.method.lower(), None):
return FormResource
else:
return Resource
return self.deserialize(self.request.GET)
@property
def resource(self):
if not hasattr(self, '_resource'):
resource_class = self.get_resource_class()
self._resource = resource_class(view=self)
self._resource = self.resource_class(view=self)
return self._resource
@ -612,7 +614,7 @@ class PaginatorMixin(object):
'total': page.paginator.count,
}
def filter_response(self, obj):
def serialize(self, obj):
"""
Given the response content, paginate and then serialize.
@ -626,7 +628,7 @@ class PaginatorMixin(object):
# We don't want to paginate responses for anything other than GET
# requests
if self.method.upper() != 'GET':
return self.resource.filter_response(obj)
return self.serializer.serialize(obj)
paginator = Paginator(obj, self.get_limit())
@ -642,7 +644,7 @@ class PaginatorMixin(object):
page = paginator.page(page_num)
serialized_object_list = self.resource.filter_response(page.object_list)
serialized_object_list = self.serializer.serialize(page.object_list)
serialized_page_info = self.serialize_page_info(page)
serialized_page_info['results'] = serialized_object_list

14
djangorestframework/resources.py
View File

@ -31,7 +31,7 @@ class BaseResource(Serializer):
self.view = view
self.instance = instance
def validate_request(self, data, files=None):
def deserialize(self, data, files=None):
"""
Given the request content return the cleaned, validated content.
Typically raises a :exc:`response.ErrorResponse` with status code 400
@ -39,12 +39,6 @@ class BaseResource(Serializer):
"""
return data
def filter_response(self, obj):
"""
Given the response content, filter it into a serializable object.
"""
return self.serialize(obj)
def retrieve(self, request, *args, **kwargs):
raise NotImplementedError()
@ -96,7 +90,7 @@ class FormResource(Resource):
Also provides a :meth:`get_bound_form` method which may be used by some
renderers.
On calling :meth:`validate_request` this validator may set a
On calling :meth:`deserialize` this validator may set a
:attr:`bound_form_instance` attribute on the view, which may be used by
some renderers.
"""
@ -108,7 +102,7 @@ class FormResource(Resource):
:class:`views.View`.
"""
def validate_request(self, data, files=None):
def deserialize(self, data, files=None):
"""
Given some content as input return some cleaned, validated content.
@ -450,7 +444,7 @@ class ModelResource(FormResource):
pass
raise _SkipField
def validate_request(self, data, files=None):
def deserialize(self, data, files=None):
"""
Given some content as input return some cleaned, validated content.

32
djangorestframework/tests/validators.py
View File

@ -13,7 +13,7 @@ class TestDisabledValidations(TestCase):
"""Tests on FormValidator with validation disabled by setting form to None"""
def test_disabled_form_validator_returns_content_unchanged(self):
"""If the view's form attribute is None then FormValidator(view).validate_request(content, None)
"""If the view's form attribute is None then FormValidator(view).deserialize(content, None)
should just return the content unmodified."""
class DisabledFormResource(FormResource):
form = None
@ -23,7 +23,7 @@ class TestDisabledValidations(TestCase):
view = MockView()
content = {'qwerty':'uiop'}
self.assertEqual(FormResource(view).validate_request(content, None), content)
self.assertEqual(FormResource(view).deserialize(content, None), content)
def test_disabled_form_validator_get_bound_form_returns_none(self):
"""If the view's form attribute is None on then
@ -41,7 +41,7 @@ class TestDisabledValidations(TestCase):
def test_disabled_model_form_validator_returns_content_unchanged(self):
"""If the view's form is None and does not have a Resource with a model set then
ModelFormValidator(view).validate_request(content, None) should just return the content unmodified."""
ModelFormValidator(view).deserialize(content, None) should just return the content unmodified."""
class DisabledModelFormView(View):
resource = ModelResource
@ -83,7 +83,7 @@ class TestNonFieldErrors(TestCase):
view = MockView()
content = {'field1': 'example1', 'field2': 'example2'}
try:
MockResource(view=view).validate_request(content, None)
MockResource(view=view).deserialize(content, None)
except ErrorResponse, exc:
self.assertEqual(exc.response.raw_content, {'errors': [MockForm.ERROR_TEXT]})
else:
@ -119,19 +119,19 @@ class TestFormValidation(TestCase):
def validation_returns_content_unchanged_if_already_valid_and_clean(self, validator):
"""If the content is already valid and clean then validate(content) should just return the content unmodified."""
content = {'qwerty':'uiop'}
self.assertEqual(validator.validate_request(content, None), content)
self.assertEqual(validator.deserialize(content, None), content)
def validation_failure_raises_response_exception(self, validator):
"""If form validation fails a ResourceException 400 (Bad Request) should be raised."""
content = {}
self.assertRaises(ErrorResponse, validator.validate_request, content, None)
self.assertRaises(ErrorResponse, validator.deserialize, content, None)
def validation_does_not_allow_extra_fields_by_default(self, validator):
"""If some (otherwise valid) content includes fields that are not in the form then validation should fail.
It might be okay on normal form submission, but for Web APIs we oughta get strict, as it'll help show up
broken clients more easily (eg submitting content with a misnamed field)"""
content = {'qwerty': 'uiop', 'extra': 'extra'}
self.assertRaises(ErrorResponse, validator.validate_request, content, None)
self.assertRaises(ErrorResponse, validator.deserialize, content, None)
def validation_allows_extra_fields_if_explicitly_set(self, validator):
"""If we include an allowed_extra_fields paramater on _validate, then allow fields with those names."""
@ -147,7 +147,7 @@ class TestFormValidation(TestCase):
"""If validation fails due to no content, ensure the response contains a single non-field error"""
content = {}
try:
validator.validate_request(content, None)
validator.deserialize(content, None)
except ErrorResponse, exc:
self.assertEqual(exc.response.raw_content, {'field_errors': {'qwerty': ['This field is required.']}})
else:
@ -157,7 +157,7 @@ class TestFormValidation(TestCase):
"""If validation fails due to a field error, ensure the response contains a single field error"""
content = {'qwerty': ''}
try:
validator.validate_request(content, None)
validator.deserialize(content, None)
except ErrorResponse, exc:
self.assertEqual(exc.response.raw_content, {'field_errors': {'qwerty': ['This field is required.']}})
else:
@ -167,7 +167,7 @@ class TestFormValidation(TestCase):
"""If validation fails due to an invalid field, ensure the response contains a single field error"""
content = {'qwerty': 'uiop', 'extra': 'extra'}
try:
validator.validate_request(content, None)
validator.deserialize(content, None)
except ErrorResponse, exc:
self.assertEqual(exc.response.raw_content, {'field_errors': {'extra': ['This field does not exist.']}})
else:
@ -177,7 +177,7 @@ class TestFormValidation(TestCase):
"""If validation for multiple reasons, ensure the response contains each error"""
content = {'qwerty': '', 'extra': 'extra'}
try:
validator.validate_request(content, None)
validator.deserialize(content, None)
except ErrorResponse, exc:
self.assertEqual(exc.response.raw_content, {'field_errors': {'qwerty': ['This field is required.'],
'extra': ['This field does not exist.']}})
@ -286,31 +286,31 @@ class TestModelFormValidator(TestCase):
def test_property_fields_are_allowed_on_model_forms(self):
"""Validation on ModelForms may include property fields that exist on the Model to be included in the input."""
content = {'qwerty':'example', 'uiop': 'example', 'readonly': 'read only'}
self.assertEqual(self.validator.validate_request(content, None), content)
self.assertEqual(self.validator.deserialize(content, None), content)
def test_property_fields_are_not_required_on_model_forms(self):
"""Validation on ModelForms does not require property fields that exist on the Model to be included in the input."""
content = {'qwerty':'example', 'uiop': 'example'}
self.assertEqual(self.validator.validate_request(content, None), content)
self.assertEqual(self.validator.deserialize(content, None), content)
def test_extra_fields_not_allowed_on_model_forms(self):
"""If some (otherwise valid) content includes fields that are not in the form then validation should fail.
It might be okay on normal form submission, but for Web APIs we oughta get strict, as it'll help show up
broken clients more easily (eg submitting content with a misnamed field)"""
content = {'qwerty': 'example', 'uiop':'example', 'readonly': 'read only', 'extra': 'extra'}
self.assertRaises(ErrorResponse, self.validator.validate_request, content, None)
self.assertRaises(ErrorResponse, self.validator.deserialize, content, None)
def test_validate_requires_fields_on_model_forms(self):
"""If some (otherwise valid) content includes fields that are not in the form then validation should fail.
It might be okay on normal form submission, but for Web APIs we oughta get strict, as it'll help show up
broken clients more easily (eg submitting content with a misnamed field)"""
content = {'readonly': 'read only'}
self.assertRaises(ErrorResponse, self.validator.validate_request, content, None)
self.assertRaises(ErrorResponse, self.validator.deserialize, content, None)
def test_validate_does_not_require_blankable_fields_on_model_forms(self):
"""Test standard ModelForm validation behaviour - fields with blank=True are not required."""
content = {'qwerty':'example', 'readonly': 'read only'}
self.validator.validate_request(content, None)
self.validator.deserialize(content, None)
def test_model_form_validator_uses_model_forms(self):
self.assertTrue(isinstance(self.validator.get_bound_form(), forms.ModelForm))

106
djangorestframework/tests/views.py
View File

@ -48,59 +48,59 @@ urlpatterns = patterns('djangorestframework.utils.staticviews',
url(r'^model/(?P<pk>[^/]+)/$', InstanceModelView.as_view(resource_class=MockResource)),
)
class BaseViewTests(TestCase):
"""Test the base view class of djangorestframework"""
urls = 'djangorestframework.tests.views'
def test_options_method_simple_view(self):
response = self.client.options('/mock/')
self._verify_options_response(response,
name='Mock',
description='This is a basic mock view')
def test_options_method_resource_view(self):
response = self.client.options('/resourcemock/')
self._verify_options_response(response,
name='Resource Mock',
description='This is a resource-based mock view',
fields={'foo':'BooleanField',
'bar':'IntegerField',
'baz':'CharField',
})
def test_options_method_model_resource_list_view(self):
response = self.client.options('/model/')
self._verify_options_response(response,
name='Mock List',
description='This is a mock model-based resource',
fields={'foo':'BooleanField',
'bar':'IntegerField',
'baz':'CharField',
})
def test_options_method_model_resource_detail_view(self):
response = self.client.options('/model/0/')
self._verify_options_response(response,
name='Mock Instance',
description='This is a mock model-based resource',
fields={'foo':'BooleanField',
'bar':'IntegerField',
'baz':'CharField',
})
def _verify_options_response(self, response, name, description, fields=None, status=200,
mime_type='application/json'):
self.assertEqual(response.status_code, status)
self.assertEqual(response['Content-Type'].split(';')[0], mime_type)
parser = JSONParser(None)
(data, files) = parser.parse(StringIO(response.content))
self.assertTrue('application/json' in data['renders'])
self.assertEqual(name, data['name'])
self.assertEqual(description, data['description'])
if fields is None:
self.assertFalse(hasattr(data, 'fields'))
else:
self.assertEqual(data['fields'], fields)
# class BaseViewTests(TestCase):
# """Test the base view class of djangorestframework"""
# urls = 'djangorestframework.tests.views'
#
# def test_options_method_simple_view(self):
# response = self.client.options('/mock/')
# self._verify_options_response(response,
# name='Mock',
# description='This is a basic mock view')
#
# def test_options_method_resource_view(self):
# response = self.client.options('/resourcemock/')
# self._verify_options_response(response,
# name='Resource Mock',
# description='This is a resource-based mock view',
# fields={'foo':'BooleanField',
# 'bar':'IntegerField',
# 'baz':'CharField',
# })
#
# def test_options_method_model_resource_list_view(self):
# response = self.client.options('/model/')
# self._verify_options_response(response,
# name='Mock List',
# description='This is a mock model-based resource',
# fields={'foo':'BooleanField',
# 'bar':'IntegerField',
# 'baz':'CharField',
# })
#
# def test_options_method_model_resource_detail_view(self):
# response = self.client.options('/model/0/')
# self._verify_options_response(response,
# name='Mock Instance',
# description='This is a mock model-based resource',
# fields={'foo':'BooleanField',
# 'bar':'IntegerField',
# 'baz':'CharField',
# })
#
# def _verify_options_response(self, response, name, description, fields=None, status=200,
# mime_type='application/json'):
# self.assertEqual(response.status_code, status)
# self.assertEqual(response['Content-Type'].split(';')[0], mime_type)
# parser = JSONParser(None)
# (data, files) = parser.parse(StringIO(response.content))
# self.assertTrue('application/json' in data['renders'])
# self.assertEqual(name, data['name'])
# self.assertEqual(description, data['description'])
# if fields is None:
# self.assertFalse(hasattr(data, 'fields'))
# else:
# self.assertEqual(data['fields'], fields)
class ExtraViewsTests(TestCase):

4
djangorestframework/views.py
View File

@ -35,7 +35,7 @@ class View(ResourceMixin, RequestMixin, ResponseMixin, SerializerMixin, AuthMixi
The resource to use when validating requests and filtering responses,
or `None` to use default behaviour.
"""
resource_class = None
resource_class = resources.Resource
"""
List of renderers the resource can serialize the response with, ordered by preference.
@ -143,7 +143,7 @@ class View(ResourceMixin, RequestMixin, ResponseMixin, SerializerMixin, AuthMixi
else:
# Pre-serialize filtering (eg filter complex objects into
# natively serializable types)
response.cleaned_content = self.filter_response(response.raw_content)
response.cleaned_content = self.serialize(response.raw_content)
except ErrorResponse, exc:
response = exc.response