API平台虚拟栏目下单

Question

我正在使用 Symfony 6 和 API 平台，在使用计算连接表的列对我的实体进行排序时遇到了一些困难。

这是表格

公司

+----+------------+--------------+--------------+
| id | name       | industry     | location     |
+----+------------+--------------+--------------+
| 1  | TechCorp   | Technology   | New York     |
| 2  | HealthPlus | Healthcare   | San Francisco|
+----+------------+--------------+--------------+

开幕

+----+------------+-------------------+-----------+
| id | company_id | title             | positions |
+----+------------+-------------------+-----------+
| 1  | 1          | Software Engineer | 1         |
| 2  | 1          | Data Scientist    | 5         |
| 3  | 2          | Nurse             | 2         |
| 4  | 2          | Teacher           | 1         |
| 5  | 1          | Administrator     | 5         |
| 6  | 1          | Administrator     | 5         |
+----+------------+-------------------+-----------+

我想按职位数量显示公司，所以我做了这个查询

SELECT c.*, SUM(o.positions) AS 'job_positions'
FROM hira_db.company c
LEFT JOIN hira_db.opening o ON o.company_id = c.id
GROUP BY c.id
ORDER BY job_positions DESC

所以它会生成这样的东西

+----+------------+--------------+--------------+---------------+
| id | name       | industry     | location     | job_positions |
+----+------------+--------------+--------------+---------------+
| 1  | TechCorp   | Technology   | New York     | 16            |
| 2  | HealthPlus | Healthcare   | San Francisco| 3             |
+----+------------+--------------+--------------+---------------+

但是当将相同的查询应用于学说时，它会弄乱分页计数

我做了一个 DoctrineExtension 并添加了这些查询

$alias = $queryBuilder->getRootAliases()[0];
$queryBuilder
    ->innerJoin(sprintf('%s.openings', $alias), 'job')
    ->addSelect('SUM(job.positions) AS HIDDEN job_positions')
    ->orderBy('job_positions', 'DESC')
    ->addGroupBy(sprintf('%s.id', $alias));
// default join column generated automatically by doctrine?
$queryBuilder->addGroupBy('openings_a1.id');

这回来了

{
    "@context": "/api/contexts/Company",
    "@id": "/api/companies",
    "@type": "hydra:Collection",
    "hydra:totalItems": 6,

而不是

{
    "@context": "/api/contexts/Company",
    "@id": "/api/companies",
    "@type": "hydra:Collection",
    "hydra:totalItems": 2,

我只有2家公司和6个职位空缺

Answer 1

您在查询生成器中使用 inner join，在 SQL 请求中使用 left join ;)