此片段来自officialwebsite按预期工作:$treeObject=Doctrine::getTable('Category')->getTree();$rootColumnName=$treeObject->getAttribute('rootColumnName');foreach($treeObject->fetchRoots()as$root){$options=array('root_id'=>$root->$rootColumnName);foreach($treeObject->fetchTree($options)as$node){echostr_repeat(