Don't a 500 when printing the validation errors.

If there's no 'resources' key, or the error is on a different resource,
just prints the base error_dict.

ckan/logic/action/create.py

@@ -300,8 +300,10 @@ def resource_create(context, data_dict):
         _get_action('package_update')(context, pkg_dict)
         context.pop('defer_commit')
     except ValidationError, e:
-        errors = e.error_dict['resources'][-1]
-        raise ValidationError(errors)
+        try:
+            raise ValidationError(e.error_dict['resources'][-1])
+        except (KeyError, IndexError):
+            raise ValidationError(e.error_dict)
 
     ## Get out resource_id resource from model as it will not appear in
     ## package_show until after commit

ckan/logic/action/update.py

@@ -98,8 +98,10 @@ def resource_update(context, data_dict):
         updated_pkg_dict = _get_action('package_update')(context, pkg_dict)
         context.pop('defer_commit')
     except ValidationError, e:
-        errors = e.error_dict['resources'][n]
-        raise ValidationError(errors)
+        try:
+            raise ValidationError(e.error_dict['resources'][-1])
+        except (KeyError, IndexError):
+            raise ValidationError(e.error_dict)
 
     upload.upload(id, uploader.get_max_resource_size())
     model.repo.commit()