Question

我有以下模型和存储库：

@Entity
@Table(name = "db_user", uniqueConstraints = { @UniqueConstraint(columnNames = "email") })
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_user")
    @SequenceGenerator(name = "seq_user", sequenceName = "seq_user")
    @Column(name = "id")
    private Long id;

    // ...
}

@Entity
@Table(name = "movie")
public class Movie extends AbstractItem {
    // Id column inherited from AbstractItem

    // ...
}

@Entity
@Table(name = "movie_user")
public class MovieOwnership extends AbstractOwnership {

    @ManyToOne
    private Movie movie;

    // ...
}

@MappedSuperclass
public abstract class AbstractOwnership{

    @Id
    @SequenceGenerator(name = "seq_default", sequenceName = "seq_default")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_default")
    @Column(name = "id")
    private Long id;

    @ManyToOne
    private User owner;

    // ...
}


public interface MovieOwnershipRepository extends QueryDslJpaRepository<MovieOwnership, Long> {

    List<MovieOwnership> findByOwnerId(Long ownerId);

    MovieOwnership findByOwnerIdAndMovie(Long ownerId, Movie movieId);

    List<MovieOwnership> findByOwnerIdAndMovieIdIn(Long ownerId, Set<Long> movieIds);
}

我正在尝试使用Spring的findBy请求通过两个实体的id字段按所有者或电影获取MovieOwnerships。我可以直接使用所有者的ID，但是在请求中使用MovieId似乎已损坏（尽管我可以使用整个Movie对象）。在上面的代码中，前两个findBy很好，但最后一个抛出此异常：

由于：java.lang.IllegalArgumentException：无法找到在此ManagedType上具有给定名称[movieId]的属性 [carrm.app.data.AbstractOwnership]

如果我尝试使用Movie中的另一个属性（例如findByMovieTitle），它将进行编译，但是我无法使其在id上起作用。

有什么办法解决这个问题吗？

Answer 1

我用JpaRepository而不是QueryDslJpaRepository尝试了相同的操作。

SQL正确生成：

select movieowner0_.id as id1_1_, movieowner0_.owner_id as owner_id2_1_, movieowner0_.movie_id as movie_id3_1_ 
from movie_ownership movieowner0_ 
left outer join user user1_ on movieowner0_.owner_id=user1_.id 
left outer join movie movie2_ on movieowner0_.movie_id=movie2_.id 
where user1_.id=? and (movie2_.id in (?))

因此它必须是QueryDslJpaRepository实现错误。

我建议您改用JpaRepository。

findBy无法使用继承的属性

1 个答案: