Question

我知道标题并没有描述我想达到的最佳效果，但我想不出别的。

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Sender中出现的密钥后过滤出PrivateMessagesUser？假设我只需要Sender PrivateMessagesUser.recipient_id = 3。我试过

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

 )
),

但它不起作用。看起来我必须以某种方式克服[0]，[1] ......键，我不知道如何。

任何帮助将不胜感激！

修改

以下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'))
            )
        )
    );

如何编辑这些行以获得所需的结果？

编辑2

我从PrivateMessagesController调用paginate（）。

社团：

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' => ''
    ),
);

PrivateMessagesUser Model：

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' => ''
    )
);

数据库表格如下：

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目标。

查看您返回的数据数组，我猜测PrivateMessagesUser belongsTo Sender。

<强> 1。查询PrivateMessagesUser模型

有时，只需要查询正确的模型即可。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')
));

<强> 2。将条件应用于相关模型

这不会一直有效，因为CakePHP的SQL生成并不总是按照您希望的方式工作。但在简单的情况下，例如hasMany关系，您可以使用：

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

同样，只有当Cake为可包含的参数执行JOIN并使用正确的条件时，这才有效。

第3。使用联接

这种方法很简单但有点乱，因为它是高度可定制的。

$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
            )
        )
    )
));

我的最后一条建议是将此代码放入模型中。尽可能遵循“脂肪模型，瘦身控制器”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，请按照上述方法操作，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

您可以将条件置于Containable中，如下所示：

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

编辑：尝试修改$this->paginate，如下所示：

$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'))
            )
        )
    )

然后调用您的paginate $this->paginate($this->PrivateMessage)

CakePHP显示数组的自定义字段

2 个答案: