CakePHP多模型关联

Question

我对CakePHP 2.x doc Model Association感到困惑。所以需要一点帮助来连接并在结果中找到包含。

Deal Table > id | title
DealAttribute Table (has options) > id | title
DealAttributeOption Table (belongs to DealAttribute) > id | title | deal_attribute_id
DealsDealAttributes Table > id | deal_id | deal_attribute_id | option_id

需要像

这样的结果

Deal [
    id, title
    DealsDealAttributes [
        id, deal_id, deal_attribute_id, option_id
        DealAttribute [
            title
        ]
        DealAttributeOption [
            title
        ]
    ]
]

我在所有三个$belongsTo的{​​{1}}中使用$hasAndBelongsToMany和DealsDealAttributes进行了尝试，但没有获得包含。 现在我想要，如果我找到任何交易，那么所有相关的模型将包含。如何设置模型关联？

Answer 1

看起来你的模型关联应该是这样的： -

class Deal extends AppModel {

    public $belongsTo = [
        'User'
    ];

    public $hasMany = [
        'DealsDealAttribute'
    ];

}

class DealsDealAttribute extends AppModel {

    public $belongsTo = [
        'Deal',
        'DealAttribute',
        'DealAttributeOption' => [
            // Foreign key breaks naming convention so needs setting manually
            'foreignKey' => 'option_id'
        ]
    ];

}

class DealAttribute extends AppModel {

    public $belongsTo = [
        'User'
    ];

    public $hasMany = [
        'DealsDealAttribute'
    ];

}

class DealAttributeOption extends AppModel {

    public $hasMany = [
        'DealsDealAttribute'
    ];

}

您需要为DealAttributeOption模型中的DealsDealAttribute关联设置外键，因为您已经从CakePHP的命名约定中删除了（理想情况下应该是deal_attribute_option_id）。

<强>更新

然后，要检索与相关记录的交易，您可以使用contain检索相应的模型，如下所示： -

$result = $this->Deal->find('first', [
    'contain' => [
        'DealsDealAttribute' => [
            'DealAttribute',
            'DealAttributeOption'
        ]
    ],
    'conditions' => [
        'Deal.id' => $id
    ]
]);