Added RequestFormMixin

Added a RequestFormMixin, which will, if used enable the use of
self.request in form clean-methods in the request handling. With basic
test.

djangorestframework/mixins.py

@@ -729,3 +729,18 @@ class PaginatorMixin(object):
         serialized_page_info['results'] = serialized_object_list
 
         return serialized_page_info
+
+
+############## RequestFormMixin ####################
+
+class RequestFormMixin(object):
+    """
+    If you add this mixin to a form class, the instantiated form will have the `set_request`-method
+    which will be set by any resource using standard form validation, allowing you to use `self.request`
+    in any form clean`-methods.
+    """
+
+    request = None
+
+    def set_request(self, request):
+        self.request = request

djangorestframework/resources.py

@@ -205,6 +205,7 @@ class FormResource(Resource):
         """
         Given some content return a Django form bound to that content.
         If form validation is turned off (:attr:`form` class attribute is :const:`None`) then returns :const:`None`.
+        If the form class uses the `RequestFormMixin` mixin, the request will be set on the form
         """
         form = self.get_form_class(method)
 
@@ -212,9 +213,15 @@ class FormResource(Resource):
             return None
 
         if data is not None or files is not None:
-            return form(data, files)
+            form_instance = form(data, files)
+        else:
+            form_instance = form()
 
-        return form()
+        try:
+            form_instance.set_request(self.view.request)
+        except AttributeError:
+            pass
+        return form_instance
 
 
 

djangorestframework/tests/mixins.py

@@ -1,12 +1,15 @@
 """Tests for the mixin module"""
+from django import forms
+from django.core.exceptions import ValidationError
+from django.conf.urls.defaults import patterns, url
 from django.test import TestCase
 from django.utils import simplejson as json
 from djangorestframework import status
 from djangorestframework.compat import RequestFactory
 from django.contrib.auth.models import Group, User
-from djangorestframework.mixins import CreateModelMixin, PaginatorMixin
+from djangorestframework.mixins import CreateModelMixin, PaginatorMixin, RequestFormMixin
 from djangorestframework.resources import ModelResource
-from djangorestframework.response import Response
+from djangorestframework.response import Response, ErrorResponse
 from djangorestframework.tests.models import CustomUser
 from djangorestframework.tests.testcases import TestModelsTestCase
 from djangorestframework.views import View
@@ -248,3 +251,33 @@ class TestPagination(TestCase):
         self.assertTrue('foo=bar' in content['next'])
         self.assertTrue('another=something' in content['next'])
         self.assertTrue('page=2' in content['next'])
+
+
+class RequestFormMockView(View):
+    """This is a request form mock view"""
+
+    class MockForm(forms.Form, RequestFormMixin):
+        foo = forms.BooleanField(required=False)
+        bar = forms.IntegerField(help_text='Must be an integer.')
+        baz = forms.CharField(max_length=32)
+
+    def clean(self):
+        if not hasattr(self, "request"):
+            raise ValidationError("Request Not Set")
+        return super(MockForm, self).clean()
+
+    form = MockForm
+
+
+urlpatterns = patterns('',
+    url(r'^requestformmock/$', RequestFormMockView.as_view()),
+)
+
+class TestRequestFormMixin(TestCase):
+    """Tests the RequestFormMixin"""
+    urls = 'djangorestframework.tests.mixins'
+
+    def test_options_method_simple_view(self):
+        response = self.client.options('/requestformmock/')
+        self.assertEqual(response.status_code, status.OK)
+