java - 带有 hibernate 条件 API 的 MySQL 中的 Orderby Timestamp 列抛出错误

Question

我正在使用 hibernate 从 MySQL 数据库中检索数据。

    @Transactional
    public List<PendingDomainEntity> listPendingDomain(int count, int offset)
            throws DaoException {
        try {
            Criteria listCriteria = sessionFactory.getCurrentSession().createCriteria(PendingDomainEntity.class);
            listCriteria.addOrder(Order.asc("domaincreateddt"));
            listCriteria.setMaxResults(count);
            listCriteria.setFirstResult(offset);
            Criterion domainstatus = Restrictions.eq("domainstatus", "Pending").ignoreCase();
            listCriteria.add(domainstatus);
            @SuppressWarnings("unchecked")
            List<PendingDomainEntity> pendingDomainList = (List<PendingDomainEntity>) listCriteria.list();
            LOGGER.debug("Regg-Service: The pending domain list is:={}", pendingDomainList);
            return pendingDomainList;
        } catch (Exception ex) {
            LOGGER.error("Exception: Service: Error while retrieving the pending domains list");
            throw new DaoException(ex.getMessage(), Response.Status.INTERNAL_SERVER_ERROR);
        }
    }

这是在 PendingDomainEntity 类中声明 domainCreatedDt 的方式

@Column(name = "DOMAINCREATEDDT")
private Timestamp domainCreatedDt;

我收到以下异常消息

could not resolve property: domaincreateddt of: mypackage.DTO.PendingDomainEntity

但是当我为 Order 使用不同的列名时，它工作正常。对时间戳列的排序有任何限制吗？

Answer 1

查看关于 HQL 的文档章节(同样适用于 Criteria API):

16.1. Case Sensitivity

With the exception of names of Java classes and properties, queries are case-insensitive. So SeLeCT is the same as sELEct is the same as SELECT, but org.hibernate.eg.FOO is not org.hibernate.eg.Foo, and foo.barSet is not foo.BARSET....

这是 JAVA 名称:

private Timestamp domainCreatedDt;

这意味着，这不是一样的:

listCriteria.addOrder(Order.asc("domaincreateddt"));

简单地说，它必须是 domainCreatedDt