Question

我最初在CakePHP中手动编写了一个非常复杂的（在结构方面）SQL查询，但现在我正在尝试重写它以使用CakePHP查找方法运行。

$sql = "SELECT 
    `users`.`username`,
        (SELECT ROUND(SUM(`divisions`.`amount`), 2)
        FROM `purchases` 
        INNER JOIN `divisions` 
        ON `purchases`.`id` = `divisions`.`purchase_id` 
        WHERE `purchases`.`user_id` = `users`.`id` 
        AND `divisions`.`user_id` = `users`.`id`
        AND `purchases`.`group_id` = " . $group_id . " 
    ) AS `owed_to`

    FROM `users` 
    INNER JOIN `memberships` ON `users`.`id` = `memberships`.`user_id` 
    INNER JOIN `groups` ON `memberships`.`group_id` = `groups`.`id`
    WHERE `memberships`.`group_id` =  " . $group_id . "  AND
    `users`.`id` !=  " . $user_id . ";";

因为SQL允许您在整个查询中应用WHERE过滤器，所以它变得非常简单。在Cake，你不能只是去：

$results = $this->User->find('all', array(
    'conditions' => array(
        'Membership.group_id =' => $id
    ),...

我尝试过设置联接：

$joins = array(
    array('table'=>'memberships', 
        'alias' => 'Membership',
        'type'=>'inner',
        'conditions'=> array(
        'Membership.user_id = User.id', 'Membership.group_id' => $id)
    ),

单层递归可以正常工作，但是与成员资格相关的模型（例如组）不受过滤器的限制。

我只能想象我做错了什么。

基本上我很困惑，任何帮助都会受到赞赏。

其他信息

User => HasMany => Purchase, Membership, Division
Membership => BelongsTo => Group, User
Group => HasMany => Membership
Purchase => HasMany => Division
Purchase => BelongsTo => User, Group
Division => BelongsTo => Purchase, User

Answer 1

你可以这样写：

$results = $this->User->find('all', array(
  'conditions' => array(
    'Membership.group_id' => $id
),...

如果用户有很多会员资格且会员资格属于用户，且$ this-＆gt; User-＆gt; recursive = 1，那么它应该有效

使用CakePHP重写复杂查询

1 个答案: