Hibernate 在@manytone上休眠@Filter

请解释一下为什么在@manytone关系上使用@Filter不起作用？ 这里我有一个非常简单的例子来说明这一点：

我在数据库中创建了两个简单的表（foo和bar）

以及我的实体：

@Entity
@FilterDef(name = "foo_active")
@Table(name = "foo")
public class Foo extends AbstractTimestampEntity implements Serializable {


    private static final long serialVersionUID = 1L;

    @Id
    @Column(name = "id")
    private Integer id;

    @ManyToOne(cascade = CascadeType.DETACH, fetch = FetchType.LAZY)
    @JoinColumn(name = "bar")
    @Filter(name = "foo_active", condition = "state='active'")
    private Bar bar;
}

@Entity
@Table(name = "foo")
public class Bar extends AbstractTimestampEntity implements Serializable {


    private static final long serialVersionUID = 1L;

    @Id
    @Column(name = "id")
    private Integer id;

    @Column(name = "name")
    private String name;

    @Column(name = "state")
    private String state;
}

现在当我运行这个查询时

@Query("SELECT f FROM Foo f")
public List<Foo> getTest();

在日志中，我可以看到：

0:47:33.878 [Test worker] DEBUG o.h.h.i.ast.QueryTranslatorImpl - HQL: SELECT f FROM pl.jcommerce.ocean.services.model.Foo f
00:47:33.878 [Test worker] DEBUG o.h.h.i.ast.QueryTranslatorImpl - S**QL: select foo0_.id as id1_5_, foo0_.created as created2_5_, foo0_.updated as updated3_5_, foo0_.bar as bar6_5_ from foo foo0_**

如您所见，有“WHERE bar.state='active'”子句

有人能帮我吗

---

谢谢大家!

您可以尝试以下操作：在

@ManyToOne

字段中添加此过滤器，而不是

@Filter

：

@Filter(name = "foo_active", condition = "bar in (select id from Bar where state = 'active')")

---

但是请注意，这可能会导致查询效率低下。

最近，当与

@manytone

一起使用时，我遇到了与

@Filter

相同的问题。诀窍是对目标实体而不是关联实体使用

@Filter

@Entity
@Table(name = "foo")
@Filter(name = "foo_active", condition = "state='active'")
public class Bar

而

Foo

类中的关联应该如下所示：

@ManyToOne(cascade = CascadeType.DETACH, fetch = FetchType.LAZY)
@JoinColumn(name = "bar")
private Bar bar;

希望这有帮助

@Entity
@Table(name = "foo")
@Filter(name = "foo_active", condition = "state='active'")
public class Bar

@ManyToOne(cascade = CascadeType.DETACH, fetch = FetchType.LAZY)
@JoinColumn(name = "bar")
private Bar bar;