Zend 框架 - 使用表数据映射器模式进行级联删除

Question

让 Zend Framework 提供 DRI 层的问题现在可以总结如下。

使用下面的类定义，我可以通过本地 UserController“public/users/delete/userId/22”删除用户但不能删除相关评论，即使我已经设置了引用映射和表关系定义。

有人知道为什么我删除用户记录时关联的评论记录没有被删除吗？

    class Default_Model_DbTable_Comment extends Zend_Db_Table_Abstract
    {
        /**
         * @var string Name of the database table
         */
        protected $_name = 'comment';

        /**
         * @desc  reference map 
         * 
         * Rows in the comment table are to be automatically deleted if the row in the 
     * User table to which they refer is deleted
     *    
     */
     protected $_referenceMap = array(
        'User' => array(
            'columns'       => 'user_id',   // the foreign key(s)
            'refTableClass' => 'Default_Model_DbTable_Users',
            'refColumns'    =>  'id',
            'onDelete'      =>  self::CASCADE,
        )
    );

}
class Default_Model_DbTable_Users extends Zend_Db_Table_Abstract
{
    /**
     * @var string Name of the database table
     */
    protected $_name = 'users';


     /**
     * @desc Defining referential integrity here since we are using MyISAM
     * Dependent tables are referred via the class name. 
     */
    protected $_dependentTables = 'Default_Model_DbTable_Comment';



}

Answer 1

我已经创建了和你一样的模型，在测试中它似乎只有在依赖表列在数组中时才有效：

class Default_Model_DbTable_Users extends Zend_Db_Table_Abstract
{
    /**
     * @var string Name of the database table
     */
    protected $_name = 'users';


     /**
     * @desc Defining referential integrity here since we are using MyISAM
     * Dependent tables are referred via the class name. 
     */
    protected $_dependentTables = array('Default_Model_DbTable_Comment');



}

当它们没有在数组中列出时，我得到错误

警告：第 632 行 C:\PHP\includes\ZendFramework-1.8.4-minimal\library\Zend\Db\Table\Row\Abstract.php 中的 foreach() 参数无效

您的环境中可能看不到此错误。