Symfony2實體克隆不起作用

Question

我喜歡克隆Symfony2中的實體。如果我克隆實體是小孩的實體，它工作正常。以下代碼不起作用。它克隆的實體，但我得到一個重複鍵錯誤

代碼在我的控制器：

$id = $request->get('id'); 
$entity = $orSessionVersionRepository->find($id); 
// A new Version must be created! 
// Clone OrSessionVersion entity 
$cloneEntity = clone $entity; 
$em->persist($cloneEntity); 
$em->flush(); 

錯誤：

An exception occurred while executing 'INSERT INTO or_session_version (version, name, duration, occupancy_standard, condition_weekday, condition_start, condition_end, creator, remarks, edit_reason, min_age, max_age, status, type, color, created, modified, or_session_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)' with params [2, "Session 1", "04:00:00", "75", "a:7:{i:0;i:0;i:1;i:1;i:2;i:2;i:3;i:3;i:4;i:4;i:5;i:5;i:6;i:6;}", "08:00:00", "16:30:00", "admin", null, null, 16, 100, "final", "default", "#1429e6", "2013-10-25 14:25:14", "2013-10-25 14:25:14", "41"]: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '2-41' for key 'or_session_id_version' 

有人能幫忙嗎？

Answer 1

您還需要克隆子實體。

嘗試添加這種方法對你父實體：

public function __clone() { 
    if ($this->id) { 
     $this->child = clone $this->child; 
    } 
} 

Answer 2

最有可能克隆的實體應與ORM分離。

你可以嘗試做

$id = $request->get('id'); 
$entity = $orSessionVersionRepository->find($id); 

$cloneEntity = clone $entity; 

$em->detach($cloneEntity); 
$cloneEntity->setId(null); 

$em->persist($cloneEntity); 
$em->flush();