我该如何编写Hibernate Criteria

Question

我们可以在标准中添加限制吗？

对于HQL-1＃

select activity from EmployeeActivity activity
   join activity.activityStep as step
   where
   activity.currentStep = 1;

Criteria ctr = getSession().createCriteria(EmployeeActivity.class)
   .createCriteria("activityStep")//Where activityStep is the another entity which is joined
   .add(Restrictions.eq("currentStep", 1))

但是我应该如何编写以下HQL查询？而且，最佳做法是什么。

select activity from EmployeeActivity activity
   join activity.activityStep as step
   where
   activity.currentStep = step.stepNumber;

Answer 1

虽然我不确定查询应该做什么

Criteria ctr = getSession().createCriteria(EmployeeActivity.class)
   .createAlias("activityStep", "step")
   .add(Restrictions.propertyEq("currentStep", "step.stepNumber"));