Symfony 和 Doctrine 2 - 根据相关实体值过滤结果

Question

给定以下基本场景：

Category
    - id
    - isDeleted

Product
    - id
    - Category
    - isDeleted

如何过滤 Symfony/Doctrine 查询以仅显示 isDeleted 值为 false 和其父类别的 isDeleted 值为 false 的产品错误的？我目前有：

$query = $em-createQuery("SELECT p FROM AppBundle:Product p WHERE p.quantity > 0 AND p.isDeleted = FALSE AND ORDER BY p.modifiedAt DESC");

但我不确定如何向上移动链并添加类似 AND p.category.isDeleted = FALSE 的内容。具体来说，尝试这样做会给我一个语法错误。

Answer 1

你快到了，只需要 JOIN 和 category:

SELECT p FROM AppBundle:Product p JOIN p.category c WHERE p.quantity > 0 
AND p.isDeleted = FALSE AND c.isDeleted = FALSE ORDER BY p.modifiedAt DESC

Symfony and Doctrine 2 - filtering results based on related entity values