@Where 子句在 hibernate join 查询中不起作用

我有 2 个带有 @Where 注释的实体。第一个是类别；

@Where(clause = "DELETED = '0'")
public class Category extends AbstractEntity

且有如下关系；

@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "category")
private Set<SubCategory> subCategories = Sets.newHashSet();

第二个实体是 SubCategory；

@Where(clause = "DELETED = '0'")
public class SubCategory  extends AbstractEntity

并包含对应关系；

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "CATEGORY_ID")
private Category category;

每当我调用以下 Dao 方法时；

@Query(value = "select distinct category from Category category join fetch category.subCategories subcategories")
public List<Category> findAllCategories();

我得到以下 sql 查询；

    select
        distinct category0_.id as id1_3_0_,
        subcategor1_.id as id1_16_1_,
        category0_.create_time as create2_3_0_,
        category0_.create_user as create3_3_0_,
        category0_.create_userip as create4_3_0_,
        category0_.deleted as deleted5_3_0_,
        category0_.update_time as update6_3_0_,
        category0_.update_user as update7_3_0_,
        category0_.update_userip as update8_3_0_,
        category0_.version as version9_3_0_,
        category0_.name as name10_3_0_,
        subcategor1_.create_time as create2_16_1_,
        subcategor1_.create_user as create3_16_1_,
        subcategor1_.create_userip as create4_16_1_,
        subcategor1_.deleted as deleted5_16_1_,
        subcategor1_.update_time as update6_16_1_,
        subcategor1_.update_user as update7_16_1_,
        subcategor1_.update_userip as update8_16_1_,
        subcategor1_.version as version9_16_1_,
        subcategor1_.category_id as categor11_16_1_,
        subcategor1_.name as name10_16_1_,
        subcategor1_.category_id as categor11_3_0__,
        subcategor1_.id as id1_16_0__ 
    from
        PUBLIC.t_category category0_ 
    inner join
        PUBLIC.t_sub_category subcategor1_ 
            on category0_.id=subcategor1_.category_id 
    where
        (
            category0_.DELETED = '0' 
        )

您能否告诉我为什么上面的查询缺少

和 subcategor1_.DELETED = '0'

在其 where 块内？

我刚刚在我的项目中解决了类似的问题。

不仅可以将 @Where 注释放在实体上，还可以放在您的子集合上。

根据javadoc https://docs.jboss.org/hibernate/orm/4.1/javadocs/org/hibernate/annotations/Where.html%20javadoc:

添加到元素实体或目标的Where子句集合的实体

在你的情况下，它会像：

@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "category")
@Where(clause = "DELETED = '0'")
private Set<SubCategory> subCategories = Sets.newHashSet();

请查找已解决的类似问题here https://forum.hibernate.org/viewtopic.php?p=2465131

我相信，与使用 Hibernate Filters 相比，这种解决方案并不具有侵入性。这些过滤器默认被禁用，并在会话级别上运行，因此每次打开新会话时启用它们都是额外的工作，特别是当您的 DAO 通过 Spring Data 等抽象进行工作时