Question

我的数据库中有2个表，第二个（订单）表有这些第一（书）表主键的foreign_key

Books 
----+---------+-------------
 id | slug    |    name     |
----+---------+--------------
  1 | math    | mathematics |
----+---------+--------------
  2 | physics | holidays    |
-----------------------------


Orders
----+---------+-------+--------
 id | book_id | count | price  |
----+---------+-------+--------
  1 |    2    |  12   | 100000 |
--------------------------------

我想要下面的结果

result
----+---------+----------+----------+----------+------------------
 id | book_id |   slug   |   name   | order_id | count | price   |
----+---------+----------+----------+-----------------------------
  1 |    2    |  physics | holidays |     1    |   12  | 100000  |
------------------------------------------------------------------

Answer 1

我相信每件产品都有价格。首先，将PRODUCT表与PRICE相关联。在蛋糕中这很容易做到：

模型中的

（Product.php）

class Product extends AppModel{
   public $hasMany = array('Price');
}

Price.php

中的

class Price extends AppModel{
   public $hasBelongTo = array('Product');
}

如果查询任何这些模型，在控制器中

，返回的数组将包含两个模型的数据。

Answer 2

建立如下关系

Product.php

....
public $hasMany = array(
        'Price' => array(
            'className' => 'Price',
            'foreignKey' => 'product_id',
            'dependent' => true,
            'conditions' => '',
            'group' => '',
            'order' => '',
            'limit' => '',
            'offset' => '',
            'exclusive' => '',
            'finderQuery' => '',
            'counterQuery' => ''
        ),
....

Price.php

.....
public $belongsTo = array(
        'Product' => array(
            'className' => 'Product',
            'foreignKey' => 'product_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
        )
....

然后在您的控制器中使用此查询

$this->Product->find('all',array('contain'=>array('Price')));

如何从关系表中获取数据

2 个答案: