Spring Data JPA自定义查询限制功能无法正常工作

Question

我创建了一个自定义查询

@Repository
public interface SecurityQuestionRepository extends JpaRepository<SecurityQuestion, Integer>{

    @Query("select q from SecurityQuestion q order by q.questionId asc limit 0, 3 ")
    public List<SecurityQuestion> findQuestion();

}

当我致电该服务并调用公共List<SecurityQuestion> findQuestion()方法时limit 0,3无效

这是休眠日志，

Hibernate: select securityqu0_.question_id as question1_4_, securityqu0_.question_desc as question2_4_ from user_security_question securityqu0_ order by securityqu0_.question_id asc

如何使此限制功能在此工作？

Answer 1

尝试传递类型为Pageable的方法参数：

@Query("select q from SecurityQuestion q order by q.questionId asc")
public List<SecurityQuestion> findQuestion(Pageable page);

当你调用这个函数时，init page就像这样：

securityQuestionRepository.findQuestion(new PageRequest(0, 3));

或者只使用原生查询：

@Query(nativeQuery = true,
       value = "select * from user_security_question order by question_id asc limit 0, 3")
public List<SecurityQuestion> findQuestion();

Answer 2

有一个更简单的变体：

public interface SecurityQuestionRepository extends JpaRepository<SecurityQuestion, Integer>{

    List<SecurityQuestion> findTop3ByOrderByIdAsc();
}

更多信息是here。

Answer 3

在nativeQuery = true, value = "your query"注释中添加参数@Query。