CakePHP 显示数组中的自定义字段

Question

我知道标题并没有描述我想要达到的最佳效果，但我想不出其他任何东西。

假设我有以下数组：

[Sender] => Array
            (
                [0] => Array
                    (
                        [id] => 1
                        [username] => admin
                        [PrivateMessagesUser] => Array
                            (
                                [id] => 1
                                [private_message_id] => 1
                                [sender_id] => 1
                                [recipient_id] => 3
                                [sender_status] => 1
                                [recipient_status] => 0
                                [random_key] => 
                            )

                    )

                [1] => Array
                    (
                        [id] => 1
                        [username] => admin
                        [PrivateMessagesUser] => Array
                            (
                                [id] => 3
                                [private_message_id] => 1
                                [sender_id] => 1
                                [recipient_id] => 2
                                [sender_status] => 1
                                [recipient_status] => 0
                                [random_key] => 
                            )

                    )

            )

我正在使用 ContainableBehaviour 来切断额外的数据。 我的问题是：如何在PrivateMessagesUser 中存在的密钥之后过滤掉Senders？假设我只需要Sender，其中PrivateMessagesUser.recipient_id = 3。 我试过了

'Sender' => array( 
 'PrivateMessagesUser' => array(

 )
),

但它没有用。看来我必须以某种方式克服 [0]、[1]... 键，但我不知道该怎么做。

任何帮助将不胜感激！

编辑

这是我获取上面发布的数组的方法：

$this->paginate = array(
        'conditions' => array(
            'PrivateMessage.id' => $this->__getUserPrivateMessagesInbox()
        ),
        'contain' => array(
            'Sender' => array(
                'fields' => array('id', 'username'),
                'PrivateMessagesUser' => array(
                    'fields' => array('PrivateMessagesUser.id')
                    //'conditions' => array('PrivateMessagesUser.recipient_id' => $this->Auth->user('id'))
                )
            ),
            'Recipient' => array(
                'fields' => array('id', 'username'),
                'conditions' => array('Recipient.id' => $this->Auth->user('id'))
            )
        )
    );

如何编辑这些行以达到预期的效果？

编辑 2

我从 PrivateMessagesController 调用 paginate()。

协会：

用户模型：

var $hasAndBelongsToMany = array(
    'PrivateMessageSent' => array(
        'className' => 'PrivateMessage',
        'joinTable' => 'private_messages_users',
        'foreignKey' => 'sender_id',
        'associationForeignKey' => 'private_message_id',
        'unique' => true,
        'conditions' => '',
        'fields' => '',
        'order' => '',
        'limit' => '',
        'offset' => '',
        'finderQuery' => '',
        'deleteQuery' => '',
        'insertQuery' => ''
    ),
    'PrivateMessageReceived' => array(
        'className' => 'PrivateMessage',
        'joinTable' => 'private_messages_users',
        'foreignKey' => 'recipient_id',
        'associationForeignKey' => 'private_message_id',
        'unique' => true,
        'conditions' => '',
        'fields' => '',
        'order' => '',
        'limit' => '',
        'offset' => '',
        'finderQuery' => '',
        'deleteQuery' => '',
        'insertQuery' => ''
    )
);

PrivateMessage 模型：

var $hasAndBelongsToMany = array(
    'Sender' => array(
        'className' => 'User',
        'joinTable' => 'private_messages_users',
        'foreignKey' => 'private_message_id',
        'associationForeignKey' => 'sender_id',
        'unique' => true,
        'conditions' => '',
        'fields' => '',
        'order' => '',
        'limit' => '',
        'offset' => '',
        'finderQuery' => '',
        'deleteQuery' => '',
        'insertQuery' => ''
    ),
    'Recipient' => array(
        'className' => 'User',
        'joinTable' => 'private_messages_users',
        'foreignKey' => 'private_message_id',
        'associationForeignKey' => 'recipient_id',
        'unique' => true,
        'conditions' => '',
        'fields' => '',
        'order' => '',
        'limit' => '',
        'offset' => '',
        'finderQuery' => '',
        'deleteQuery' => '',
        'insertQuery' => ''
    ),
);

PrivateMessages 用户模型：

var $belongsTo = array(
    'PrivateMessage' => array(
        'className' => 'PrivateMessage',
        'foreignKey' => 'private_message_id',
        'conditions' => '',
        'fields' => '',
        'order' => ''
    ),
    'Sender' => array(
        'className' => 'User',
        'foreignKey' => 'sender_id',
        'conditions' => '',
        'fields' => '',
        'order' => ''
    ),
    'Recipient' => array(
        'className' => 'User',
        'foreignKey' => 'recipient_id',
        'conditions' => '',
        'fields' => '',
        'order' => ''
    )
);

数据库表如下：

• users: id, username, ...
• private_messages: id, subject, ...
• private_messages_users: id, private_message_id, sender_id, recipient_id, status, ...

Answer 1

有三种方法可以实现这一点。

查看您返回的数据数组，我猜是PrivateMessagesUser 属于Sender。

1.查询 PrivateMessagesUser 模型

有时，只需查询正确的模型。您可以将条件直接应用于要应用限制的模型。

$this->Sender->PrivateMessagesUser->find('all', array(
    'conditions' => array('PrivateMessagesUser.recipient_id' => 3),
    'contain' => array('Sender')
));

2。将条件应用于相关模型

这并不总是有效，因为 CakePHP 的 SQL 生成并不总是按您希望的方式工作。但在像 hasMany 关系这样的简单情况下，您可以使用：

$this->Sender->find('all', array(
    'conditions' => array('PrivateMessagesUser.recipient_id' => 3),
    'contain' => array('PrivateMessagesUser')
));

同样，这只有在 Cake 对 Containable 参数执行 JOIN 并正确使用条件时才有效。

3。使用联接

这种方法是万无一失的，但由于它是高度可定制的，所以有点混乱。

$this->Sender->find('all', array(
    'joins' => array(
        array(
            'table' => 'private_messages_users',
            'alias' => 'PrivateMessagesUser',
            'type' => 'inner',
            'conditions' => array(
                'PrivateMessagesUser.sender_id = Sender.id',
                'PrivateMessagesUser.recipient_id' => 3
            )
        )
    )
));

---

我给您的最后一条建议是将此代码放入模型中。尽可能遵循“胖模型，瘦控制器”的原则。

在Sender 模型中：

function fetchByRecipientId($recipientId) {
    ...
}

祝你好运！

---

编辑：为了使这项工作适用于分页，请遵循上述方法，但使用以下格式：

$this->paginate = array(
    'PrivateMessagesUser' => array(
        'conditions' => array('PrivateMessagesUser.recipient_id' => 3),
        'contain' => array('Sender'),
        // 'order' => ... other keys if you wish
    )
);
$this->set('senders', $this->paginate());

Answer 2

您可以在 Containable 中放置条件，如下所示：

$this->Sender->find('all', array(
   'contain' => array(
      'PrivateMessagesUser' => array('conditions' => array('recipient_id' => 3))
   )
));

编辑： 尝试修改您的$this->paginate 如下：

$this->paginate = array(
        'conditions' => array(
            'PrivateMessage.id' => $this->__getUserPrivateMessagesInbox()//array of message id's
        ),
        'fields' => array('PrivateMessagesUser.id'),
        'contain' => array(
            'Sender' => array(
                'fields' => array('id', 'username'),
            ),
            'Recipient' => array(
                'fields' => array('id', 'username'),
                'conditions' => array('Recipient.id' => $this->Auth->user('id'))
            )
        )
    )

然后调用你的分页$this->paginate($this->PrivateMessage)