# _mail_flat_thread: automatically set free messages to the first posted message
if self._mail_flat_thread and not parent_id and thread_id:
- message_ids = mail_message.search(cr, uid, ['&', ('res_id', '=', thread_id), ('model', '=', model)], context=context, order="id ASC", limit=1)
+ message_ids = mail_message.search(cr, uid, ['&', ('res_id', '=', thread_id), ('model', '=', model), ('type', '=', 'email')], context=context, order="id ASC", limit=1)
+ if not message_ids:
+ message_ids = message_ids = mail_message.search(cr, uid, ['&', ('res_id', '=', thread_id), ('model', '=', model)], context=context, order="id ASC", limit=1)
parent_id = message_ids and message_ids[0] or False
# we want to set a parent: force to set the parent_id to the oldest ancestor, to avoid having more than 1 level of thread
elif parent_id: