在Dao Class

Question

我正在尝试更新存储在数据库表中的值。 但我收到错误“没有给定标识符的行存在：[此实例尚未作为数据库＃3中的行存在]”

我正在尝试运行的代码

public Integer findPersonXHrUserId(String nic)
    {
      Query query = em.createQuery("select u.userId from XHrUser u where (u.nic) = (:nic)")
              .setParameter("nic", nic);
      List<Integer> list = query.getResultList();
      return list.isEmpty() || list.get(0) == null ? 0 : list.get(0);
    }


public void UpdateUserInDbTable(String firstName, String lastName, String nic, String phoneNumber, String emailAddress) {

        int userId = findPersonXHrUserId(nic);

        XHrUser xHrUserObj= new XHrUser();

        xHrUserObj.setUserId(userId);
        xHrUserObj.setFirstName(firstName);
        xHrUserObj.setLastName(lastName);
        xHrUserObj.setNic(nic);
        xHrUserObj.setPhone(phoneNumber);
        xHrUserObj.setEmail(emailAddress);

        em.persist(xHrUserObj);

        xHrUserObj= em.find(XHrUser.class, xHrUserObj.getUserId());     
        em.merge(xHrUserObj);
        em.refresh(xHrUserObj);


    }

由于

Answer 1

我删除了坚持并且它有效..