复制 n:n 对象

public function CopyContactsFromFunctionalCI($oSource)
{
   // 此方法应从 FunctionalCI 调用
   $sSourceClass = get_class($oSource);
   if ($sSourceClass != 'FunctionalCI')
   {
        throw new Exception("Wrong source class '$sSourceClass' : 
        CopyContactsFromFunctionalCI method should be called by a user action on a FunctionalCI!");
   }
   // 此方法被调用两次：
   //   创建表单显示时：'????'
   //   保存时：'apply_new'
   // 仅在一个情况下复制链接，避免链接重复
   $sOperation= utils::ReadPostedParam('operation');
   if ($sOperation == 'apply_new')
   {
        return;
   }
   // 获取相关对象列表
   $oSetSrc = new CMDBObjectSet(DBObjectSearch::FromOQL("
        SELECT Contact AS c
        JOIN lnkContactToFunctionalCI AS l1 ON l1.contact_id = c.id
        WHERE l.functionalci_id = :id"), array(), array('id'=>$oSource->GetKey()));
   // 更简单的方案：$oSetSrc = $oSource->Get('contacts_list');

   $oSetDst = $this->Get('contacts_list');
   while ($oSrc = $oSetSrc->Fetch())
   {
        $oLnkDst = MetaModel::NewObject('lnkContactToTicket');
        $oLnkDst->Set('contact_id', $oSrc->GetKey());
        $oSetDst->AddItem($oLnkDst);
    }
    $this->Set('contacts_list', $oSetDst);
}