Update filter backend+tests

django_filters/rest_framework/backends.py

@@ -50,9 +50,7 @@ def filter_queryset(self, request, queryset, view):
         if filter_class:
             filterset = filter_class(request.query_params, queryset=queryset, request=request)
             if not filterset.is_valid() and self.raise_exception:
-                from rest_framework.exceptions import ValidationError
-
-                raise ValidationError(utils.raw_validation(filterset.errors))
+                raise utils.translate_validation(filterset.errors)
             return filterset.qs
         return queryset
 

tests/rest_framework/test_backends.py

@@ -14,6 +14,7 @@
     backends
 )
 
+from ..models import Article
 from .models import FilterableItem
 
 factory = APIRequestFactory()
@@ -223,3 +224,28 @@ class Backend(DjangoFilterBackend):
         # derived filter_class.Meta should inherit from default_filter_set.Meta
         self.assertIn(BooleanField, filter_overrides)
         self.assertDictEqual(filter_overrides[BooleanField], {})
+
+
+class ValidationErrorTests(TestCase):
+
+    def test_errors(self):
+        class F(FilterSet):
+            class Meta:
+                model = Article
+                fields = ['id', 'author', 'name']
+
+        view = FilterFieldsRootView()
+        backend = DjangoFilterBackend()
+        request = factory.get('/?id=foo&author=bar&name=baz')
+        request = view.initialize_request(request)
+        queryset = Article.objects.all()
+        view.filter_class = F
+
+        with self.assertRaises(serializers.ValidationError) as exc:
+            backend.filter_queryset(request, queryset, view)
+
+        # test output, does not include error code
+        self.assertDictEqual(exc.exception.detail, {
+            'id': ['Enter a number.'],
+            'author': ['Select a valid choice. That choice is not one of the available choices.'],
+        })