Don't skip fields if there is an error

rest_framework/fields.py

@@ -415,8 +415,6 @@ class Field(object):
         try:
             return get_attribute(instance, self.source_attrs)
         except (KeyError, AttributeError) as exc:
-            if not self.required and self.default is empty:
-                raise SkipField()
             msg = (
                 'Got {exc_type} when attempting to get a value for field '
                 '`{field}` on serializer `{serializer}`.\nThe serializer '