Added an exception handler for validation (and other exception) errors.

Author: jerel

example/api/serializers/identity.py

@@ -6,6 +6,12 @@ class IdentitySerializer(serializers.ModelSerializer):
     """
     Identity Serializer
     """
+    def validate_first_name(self, data):
+        if len(data) > 10:
+            raise serializers.ValidationError(
+                    'There\'s a problem with first name')
+        return data
+
     class Meta:
         model = auth_models.User
         fields = (

example/settings.py

@@ -38,6 +38,7 @@
     'PAGINATE_BY': 1,
     'PAGINATE_BY_PARAM': 'page_size',
     'MAX_PAGINATE_BY': 100,
+    'EXCEPTION_HANDLER': 'rest_framework_ember.exceptions.exception_handler',
     # DRF v3.1+
     'DEFAULT_PAGINATION_CLASS':
         'rest_framework_json_api.pagination.PageNumberPagination',

example/tests/test_generic_viewset.py

@@ -48,4 +48,30 @@ def test_ember_expected_renderer(self):
             }
         )
 
+    def test_custom_exceptions(self):
+        """
+        Exceptions should conform to json api spec
+        """
+        response = self.client.post('/identities', {
+            'email': 'bar', 'first_name': 'alajflajaljalajlfjafljalj'})
+        self.assertEqual(
+            json.loads(response.content.decode('utf8')),
+            {
+                'errors': [
+                    {
+                        'source': {
+                            'parameter': 'email'
+                        },
+                        'detail': 'Enter a valid email address.'
+                    },
+                    {
+                        'source': {
+                            'parameter': 'first_name'
+                        },
+                        'detail': 'There\'s a problem with first name'
+                    },
+                ]
+            }
+        )
+
 

rest_framework_ember/exceptions.py

@@ -0,0 +1,20 @@
+from rest_framework.views import exception_handler as drf_exception_handler
+
+
+def exception_handler(exc, context):
+    response = drf_exception_handler(exc, context)
+
+    errors = []
+    for field, error in response.data.items():
+        for message in error:
+            errors.append({
+                'detail': message,
+                'source': {
+                    'parameter': field,
+                },
+            })
+    context['view'].resource_name = 'errors'
+    response.data = errors
+    return response
+
+