自定义查询 Spring Data JPA

Question

我需要在我的存储库中扩展 CrudRepository 的自定义查询

@Repository
public interface SongListRepository extends CrudRepository<SongList, Integer> {

    @Query("SELECT sl FROM song_list sl WHERE sl.owner=:owner")
    Set<SongList> findAllSongListsForUser(
            @Param("owner") String owner);
}

当我尝试启动时抛出以下异常：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'songListController': Unsatisfied dependency expressed through field 'songListService';

nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'songListService': Unsatisfied dependency expressed through field 'repository';

nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'songListRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.Set htwb.ai.songsservice.repository.SongListRepository.findAllSongListsForUser(java.lang.String)!

如何在 CrudRepository 中创建自定义查询？

Answer 1

您无需创建自己的查询。只需使用基于方法签名的自动生成查询。

List<SongList> findAllByOwner(String owner);

这将创建查询。