Hibernate更新查询：如何设置默认值？

Question

I have two entity classes

class User { 
    Integer userId;
    String userName;
    UserType userType;
}

and

class UserType {
    Integer typeId;
    String type;
    Set<User> userList;
}

How can I set new UserType() in all user.userType where user.userType=null through HQL update query?

I am new in hibernate.

Answer 1

You could do something like:

UserType userType = /* code to get already persisted userType */;

Query query = session.createQuery("update User u set u.userType = :newType where u.userType is null");
query.setParameter("newType", userType);
int result = query.executeUpdate();