休眠多个表上的一对多联接

Question

So, I have a class called app. app has a one-to-many relation with a class called user. user has a one-to-many relation with a class called login. Login contains fields that represent the time the user logged out, expressed as timestamps. If I wanted to make a hibernate criteria query that returns the users that have signed on within the past x numbers of days, how would you do it? This is what I have so far, and it just returns all users regardless of when they logged on:

Calendar calendar = Calendar.getInstance();
java.util.Date now = calendar.getTime();
java.sql.Timestamp currentTimestamp = new  java.sql.Timestamp(now.getTime());
Calendar calendar2 = Calendar.getInstance();
calendar2.roll(Calendar.DAY_OF_MONTH, days*(-1));
java.util.Date past = calendar2.getTime();
java.sql.Timestamp pastTimestamp = new java.sql.Timestamp(past.getTime());    
Criteria LoginCriteria = session.createCriteria(Application.class, "App")
                    .add(Restrictions.eq("App.appID", appid))
                    .createAlias("App.users", "user")
                        .createAlias("user.logins", "lg")
                        .add(Restrictions.ge("lg.endTime", pastTimestamp ))
                        .add(Restrictions.le("lg.endTime", currentTimestamp));

I am using timestamps to measure time. I can provide more info if needed.

Answer 1

Criteria LoginCriteria = session.createCriteria(User.class, "user")
                .add(Restrictions.eq("user.appId", "https://"+appid+".com"))
                .createAlias("user.logins", "lg")
                .add(Restrictions.ge("lg.startTime", pastTimestamp ))
                .add(Restrictions.le("lg.startTime", currentTimestamp));

Answer 2

Alternatively I think this should work, though I don't have your structure set up to test it out:

Criteria LoginCriteria = session.createCriteria(User.class, "user")
      .add(Restrictions.eq("user.appId", "https://"+appid+".com"))
      .createCriteria("logins")
           .add(Restrictions.ge("startTime", pastTimestamp))
           .add(Restrictions.le("startTime", currentTimestamp));