CakePHP 如何获取关联数据和 COUNT/GROUP BY

Question

我在使用 Cakephp 查询生成器时遇到了一些问题，并试图获得我正在寻找的结果。我有三个表 'Users'、'Items'、'Owns'，其中 Owns 属于 'Users' 和 'Items'...许多相同的项目）。

所以我想 return 用户“拥有”的项目以及计数...但是，每当我将计数添加到查询中时，我都会丢失相关的项目数据。

示例 - 此 returns 用户数据以及关联的拥有数据和关联的项目数据，如查询下方所示

$owns = $this->Users->get($id, [
  'contain' => [
    'Owns' => function($q) { return $q->find('all')->group(['Owns.item_id']); },
    'Owns.Items'
  ],
]);

SQL由此生成的是

SELECT 
  Owns.id AS Owns__id, 
  Owns.item_id AS Owns__item_id, 
  Owns.user_id AS Owns__user_id, 
  Items.id AS Items__id, 
  Items.name AS Items__name, 
  Items.description AS Items__description, 
  Items.created AS Items__created, 
  Items.modified AS Items__modified 
FROM 
  owns Owns 
  INNER JOIN items Items ON Items.id = (Owns.item_id) 
WHERE 
  Owns.user_id in (1) 
GROUP BY 
  Owns.item_id

数据结果如下所示：

'owns' => [
    'id' => (int) 1,
    'username' => 'myusername',
    'owns' => [
        (int) 0 => object(App\Model\Entity\Own) id:0 {
        'id' => (int) 2
        'item_id' => (int) 1
        'user_id' => (int) 1
            'item' => object(App\Model\Entity\Item) id:1 {
                'id' => (int) 1
                'name' => 'Item Name'
                'description' => 'Item Description'

但是在 'owns' 查询中我想添加计数（即拥有的数量）。我可以使用此查询获取计数，但随后我从结果中丢失了关联的项目对象。我已经尝试了很多不同的方法，但似乎总是如果我想使用 SQL 计数，我无法获得相关数据。

$owns2 = $this->Users->get($id, [
  'contain' => [ 
    'Owns' => function($q) { return $q->select(['count' => $q->func()->count('Owns.id'),'Owns.id', 'Owns.user_id', 'Owns.item_id'])->group(['Owns.item_id']); },
    'Owns.Items'
  ],
]);

SQL由此生成的是

SELECT 
  (COUNT(Owns.id)) AS count, 
  Owns.id AS Owns__id, 
  Owns.user_id AS Owns__user_id, 
  Owns.item_id AS Owns__item_id 
FROM 
  owns Owns 
  INNER JOIN items Items ON Items.id = (Owns.item_id) 
WHERE 
  Owns.user_id in (1) 
GROUP BY 
  Owns.item_id

数据结果如下所示：

'owns2' => [
    'id' => (int) 1,
    'username' => 'myusername',
    'owns' => [
        (int) 0 => object(App\Model\Entity\Own) id:36 {
        'count' => (int) 4
        'id' => (int) 2
        'user_id' => (int) 1
        'item_id' => (int) 1

如能深入了解如何将“计数”纳入第一个 $user 查询或将相关项目纳入 $user2，我们将不胜感激。

Answer 1

为了保留在 $owns = find('all') 查询中返回的关联 table 字段以及 SQL 计数函数，我需要添加关联字段进入 select 语句

$owns2 = $this->Users->get($id, [
  'contain' => [ 
    'Owns' => function($q) { return $q->select(['count' => $q->func()->count('Owns.id'),'Owns.id', 'Owns.item_id','Owns.user_id', 'Items.id', 'Items.collection_id','Items.name', 'Items.description'])->group(['Owns.item_id']); },
    'Owns.Items'
  ],

]);

CakePHP 如何获取关联数据和 COUNT/GROUP BY

CakePHP How to Get Associated Data and COUNT/GROUP BY

cakephp

cakephp-4.x