FuelPHP ORM模型上的主键无法更改

我一直在用这个ORM错误敲打我的头： Fuel \ Core \ FuelException [错误]：模型Model_CustomValue上的主键无法更改。FuelPHP ORM模型上的主键无法更改

下面是我的模型我在遇到问题的相关信息：

<?php 
use Orm\Model; 

class Model_Purchase extends Model 
{ 
    protected static $_has_many = array(
     'customvalues' => array(
      'model_to' => 'Model_CustomValue', 
      'key_to' => 'purchase_id', 
      'cascade_delete' => true, 
     ) 
    ); 

    protected static $_properties = array(
     'id', 
     'customer_id', 
     'payment_id', 
     'audit_id', 
     'created_at', 
     'updated_at', 
    ); 


<?php 
use Orm\Model; 

class Model_CustomValue extends Model 
{ 
    protected static $_table_name = 'customvalues'; 
    protected static $_primary_key = array('purchase_id', 'customfield_id'); 

    protected static $_belongs_to = array(
     'purchase' => array(
      'key_from' => 'purchase_id', 
      'model_to' => 'Model_Purchase', 
      'key_to' => 'id', 
     ), 
    );

当试图与Model_CustomValue对象的数组保存Model_Purchase为一个名为$购买对象的“customvalues”属性，我得到“模型Model_CustomValue上的主键不能更改”。

我试着在Model_CustomValue上的“belongs_to”中交换key_from /，但无济于事。

我使用的燃油1.6（哈希：6e6d764）

请让我知道更多的信息将是有益的，我来提供。

来源

2013-08-22 bigdawggi

从FuelPHP forum thread，哈罗回答：

You can not have a column which is at the same time FK and PK. Which you have on your Model_CustomValue.

The reason for that is that when you disconnect a relation, the FK will be set to NULL, which should not happen with a PK.

我再澄清，对于我们这些谁可能需要从最初的例子具体的例子，我确认：

So just re-stating why that's not allowed:

Model_CustomValue uses the "purchase_id" as part of its PK as well as the FK to Model_Purchase. And if the two Models were to be unlinked, that would lead to a null portion of the PK for Model_CustomValue -- which obviously isn't allowed.

来源

2013-08-23 21:53:28 bigdawggi

FuelPHP ORM模型上的主键无法更改

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