public function doUpvote() { CW::$app->db->beginTransaction(); $result = \models\Comment::upvote(CW::$app->request->post('id'), CW::$app->user->identity->id); if ($result) { CW::$app->db->commit(); } else { CW::$app->db->rollback(); } CW::$app->db->close(); return json_encode($result); }