JPA无法删除对象【实际项目解决办法】

并非通用， 根据自己实际情况来

不能删除前的dao方法

public void delete(CmsProjectNew bean);

可以删除后的dao方法

@Modifying
@Query("delete CmsProjectNew bean where bean.id in (?1)")
public void deleteById(Integer id);

【下面错误原因】——service方法增加@Transactional

@Transactional
public void delete(int id) {
dao.deleteById(id);
}

严重: Servlet.service() for servlet [background] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query] with root cause
javax.persistence.TransactionRequiredException: Executing an update/delete query