如何在CakePHP中过滤深层关联 [英] How do I filter deep associations in CakePHP

问题描述

我有以下表：binder，docs，users，docs_users。 Doc belongsTo Binder，Doc hasAndBelongsToMany User。

I have the following tables: binders, docs, users, docs_users. Doc belongsTo Binder, Doc hasAndBelongsToMany User.

我想要为当前登录的用户获取绑定程序及其关联的文档（docs_users表中关联的user_id）。

I want to get binders and their associated docs for the user that is currently logged in (the associated user_id in the docs_users table).

我尝试了Containable和find（'all'）与连接，条件等，但我不知道如何删除从docs_users表中没有关联的用户的文档。

I have tried Containable and find('all') with joins, conditions, etc. but I can't figure out how to remove the Docs that are from Users who are not associated in the docs_users table.

此代码无效：

$binders = $this->Binder->find( 
        'all',                  
        array( 
            'joins' => array(
                array( 
                    'table' => 'binders_users', 
                    'alias' => 'BindersUser', 
                    'type' => 'inner', 
                    'foreignKey' => false, 
                    'conditions'=> array(
                        'BindersUser.binder_id = Binder.id',
                        'BindersUser.user_id = ' . $this->Auth->user('id')
                    )
                ),
                array( 
                    'table' => 'docs', 
                    'alias' => 'Doc', 
                    'type' => 'left', 
                    'foreignKey' => false, 
                    'conditions'=> array(
                        'Doc.binder_id = Binder.id',
                    )
                ),                          
                array( 
                    'table' => 'docs_users', 
                    'alias' => 'DocsUser', 
                    'type' => 'left', 
                    'foreignKey' => false, 
                    'conditions'=> array(
                        'DocsUser.doc_id = Doc.id',
                        'DocsUser.user_id = ' . $this->Auth->user('id')
                    )
                )           
            ),
            'recursive'=>0
        )
    );
$this->set('binders', $binders);

这也不是：

$this->Binder->recursive = 2;
$this->Binder->Behaviors->attach('Containable');
$this->Binder->contain(array(
    'Branch',
    'Doc' => array(                     
        'User' => array(
            'DocsUser' => array(
                'conditions' => array('id = "17"')
            )
        )
    )
));
$binders = $this->Binder->find('all');

你经验丰富的专业人员的任何帮助将是伟大的！非常感谢！

Any help from you seasoned pros would be great! Thanks!

替代/简化解决方案？

以获取用户具有权限的绑定者。短而甜。但是，它仍然会发送所有关联的文档通过，这是不是我想要的行为。它只需要传递用户有权限的文档（如前所述）。

This works if I just want to get binders to which users have permissions. Short and sweet. However, it will still send ALL associated docs through, which is NOT the behavior I want. It needs to only pass on the docs to which the user has permissions (as described previously).

$binders = $this->Binder->find( 
    'all',                  
    array( 
        'joins' => array(
            array( 
                'table' => 'binders_users', 
                'alias' => 'BindersUser', 
                'type' => 'inner', 
                'foreignKey' => false, 
                'conditions'=> array(
                    'BindersUser.binder_id = Binder.id',
                    'BindersUser.user_id = ' . $this->Auth->user('id')
                )
            )
        )
    )
);

推荐答案

这里是最终解决方案的反馈我得到了。我认为这是一个优雅的解决方案，可以在需要深度关联的任何场景中重用。

Here's the final solution I came up with based on all of the great feedback I got. I think this is an elegant solution that can be reused in any scenario where deep associations are required.

在binder_controller中，我解除绑定Doc模型， finderQuery仅选择用户有权查看的文档。

In the binder_controller I unbound the Doc model, and bound it back using the finderQuery to select only the Docs that a user has permission to see. Then in joined the binders_users table selecting only the binders that users have permissions to.

感谢大家的帮助！

$this->Binder->unbindModel(array('hasMany' => array('Doc')));
$this->Binder->bindModel(
    array('hasMany' => array(
            'Doc' => array(
                'className' => 'Doc',
                'foreignKey' => 'binder_id',
                'dependent' => false,
                'finderQuery' => 'SELECT Doc.* FROM docs AS Doc INNER JOIN docs_users AS DocsUser ON DocsUser.doc_id = Doc.id AND DocsUser.user_id = ' . $this->Auth->user('id')
            )
        )
    )
);

$binders = $this->Binder->find( 
    'all',                  
    array( 
        'joins' => array(
            array( 
                'table' => 'binders_users', 
                'alias' => 'BindersUser', 
                'type' => 'inner', 
                'foreignKey' => false, 
                'conditions'=> array(
                    'BindersUser.binder_id = Binder.id',
                    'BindersUser.user_id = ' . $this->Auth->user('id')
                )
            )               
        )
    )
);

更多绑定/解除绑定模型

这篇关于如何在CakePHP中过滤深层关联的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！