Slight change to the build_error_result API to return dict.

The dict is then wrapped with the Error class.

huey/api.py

@@ -389,8 +389,8 @@ def _execute(self, task, timestamp):
 
         if self.results and not isinstance(task, PeriodicTask):
             if exception is not None:
-                error = self.build_error_result(task, exception)
-                self.put_result(task.id, error)
+                error_data = self.build_error_result(task, exception)
+                self.put_result(task.id, Error(error_data))
             elif task_value is not None or self.store_none:
                 self.put_result(task.id, task_value)
 
@@ -453,12 +453,12 @@ def build_error_result(self, task, exception):
         except AttributeError:  # Seems to only happen on 3.4.
             tb = '- unable to resolve traceback on Python 3.4 -'
 
-        return Error({
+        return {
             'error': repr(exception),
             'retries': task.retries,
             'traceback': tb,
             'task_id': task.id,
-        })
+        }
 
     def _task_key(self, task_class, key):
         return ':'.join((key, self._registry.task_to_string(task_class)))

huey/tests/test_api.py

@@ -1293,8 +1293,7 @@ def get_huey(self):
         class CustomError(MemoryHuey):
             def build_error_result(self, task, exc):
                 err = super(CustomError, self).build_error_result(task, exc)
-                err.metadata['name'] = task.name
-                err.metadata['args'] = task.args
+                err.update(name=task.name, args=task.args)
                 return err
         return CustomError(utc=False)