在编写自定义SQL的时候需要注意

  • @Query 注解只能用来查询,想要进行添加、修改和删除操作需要配合 @Modifying 注解一同使用
      @Modifying 
      @Query("update AdminUser set username=:#{#adminUser.username},password=:#{#adminUser.password} where id=:#{#adminUser.id}") 
      int updateInfoById(@Param("adminUser") AdminUser adminUser); 
    
         
    否则执行会报错错误信息如下,提示不支持修改操作
    org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.hql.internal.QueryExecutionRequestException: Not supported for DML operations [update com.leimo.module.adminuser.entity.AdminUser set username=:__$synthetic$__1,password=:__$synthetic$__2,updateTime=:__$synthetic$__3 where id=:__$synthetic$__4]; nested exception is java.lang.IllegalStateException: org.hibernate.hql.internal.QueryExecutionRequestException: Not supported for DML operations [update com.leimo.module.adminuser.entity.AdminUser set username=:__$synthetic$__1,password=:__$synthetic$__2,updateTime=:__$synthetic$__3 where id=:__$synthetic$__4] 
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:370) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:527) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    
         
  • 只是添加了 @Modifying 注解在执行修改操作的时候仍然会报错,提示在进行删除和修改的时候需要给方法加上事务
    org.springframework.dao.InvalidDataAccessApiUsageException: Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query 
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:402) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:527) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE] 
    
         
    在可以直接在Repository的修改接口上添加 @org.springframework.transaction.annotation.Transactional 注解就可以正常执行修改语句了,或者在调用改接口的方法上添加 @Transactional 事务注解即可
      @Transactional 
      @Modifying 
      @Query("update AdminUser set username=:#{#adminUser.username},password=:#{#adminUser.password} where id=:#{#adminUser.id}") 
      int updateInfoById(@Param("adminUser") AdminUser adminUser); 
    
         

    参考博客
    IT虾米网

原文地址:IT虾米网

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