CakePHP 3中同一模型的多个关联

我正在使用cake PHP版本3.x.

当我查询MessagesTable时,我想获取发件人和邮件接收者的用户数据.我已经在cakePHP 2中多次这样做但我无法弄清楚为什么它在版本3.x中不起作用.

我有一个UsersTable和一个MessagesTable.

UsersTable

$this->hasMany('Messages');

MessagesTable

$this->belongsTo('Users',[
    'foreignKey' => 'sender_id','propertyName' => 'Sender',]);
$this->belongsTo('Users',[
    'foreignKey' => 'user_id','propertyName' => 'Receiver'
]);

这是我正在使用的查询

$messages = $this->Messages->find()
        ->where(['Messages.user_id' => $this->Auth->user('id')])
        ->orwhere(['Messages.sender_id' => $this->Auth->user('id')])
        ->order(['Messages.created' => 'DESC'])
        ->contain([
            'Users.Pictures',]);

我收回了Receiver数据,但也没有收到Sender数据.任何帮助将非常感激

你的关联是错的.如果对多个关联使用相同的模型,则需要使用不同的别名和className属性(就像在CakePHP 2中一样)： –

$this->belongsTo('Sender',[
    'className' => 'Users','foreignKey' => 'sender_id','propertyName' => 'sender',]);
$this->belongsTo('Receiver','foreignKey' => 'user_id','propertyName' => 'receiver'
]);

这是described in the docs.

在您的示例代码中,Receiver会覆盖User的关联,因此您只能在结果中看到Receiver模型.

您的查询需要是这样的： –

$messages = $this->Messages->find()
    ->where(['Messages.user_id' => $this->Auth->user('id')])
    ->orwhere(['Messages.sender_id' => $this->Auth->user('id')])
    ->order(['Messages.created' => 'DESC'])
    ->contain([
        'Receivers' => ['Pictures'],'Senders' => ['Pictures']
    ]);