java - Spring data CrudRepository findBy 关系

Question

我想选择所有具有状态为新的 Bar 的 Foo 实体。

这是我尝试过的:

@Entity
@Table(name = "FOO")
class Foo {

    @Id
    @Column(name = "ID")
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private Long id;

    @OneToMany
    private Set<Bar> bars;

   //...
}



public interface FooRepository extends CrudRepository<Foo, Long> {


    @Query("select m from Foo f where f.bars.status = 'NEW' ")
    public Page<Foo> findByBarStatus(Pageable pageable);

}

但我明白:

org.hibernate.exception.SQLGrammarException: could not prepare statement

我还尝试编写 join 语句:

select f from Foo f inner join f.bars b where b.status = 'NEW'

Answer 1

SELECT f FROM Foo AS f JOIN f.bars AS b WHERE b.status = 'NEW'