我可以通过属于提取的字段订购标准查询吗？

Question

按属于加入的字段排序效果很好：

CriteriaBuilder builder = em.getCriteriaBuilder();
Root root = criteria.from(Employee.class);
Join joinPerson = root.join("person");

criteria.orderBy(builder.asc(joinPerson.get("lastName")));

如何通过获取：

来解决类似问题

CriteriaBuilder builder = em.getCriteriaBuilder();
Root root = criteria.from(Employee.class);
Fetch fetchPerson = root.fetch("person");

criteria.orderBy(builder.asc(fetchPerson.????));

Answer 1

将您的抓取功能转换为路径，例如：

    Path fetchAsPath = (Path) root.fetch("person");

    fetchAsPath.get("lastName");