Hi,

I have a one-to-one mapping like below:


User.hbm.xml
<class name="org.hibernate.tutorial.domain.User" table="user_i">
<id name="userId" column="user_id">
<generator class="assigned"/>
</id> <one-to-one name="userDetails" class="org.hibernate.tutorial.domain.UserDetails" cascade="all" />
</class>

<class name="org.hibernate.tutorial.domain.UserDetails" table="user_details">
<id name="userId" column="user_id">
<generator class="foreign">
<param name="property">user</param>
</generator>
</id>
<one-to-one name="user" class="org.hibernate.tutorial.domain.User" constrained="true" />
</class>

Below is the code used for saving user object
User user = new User();
user.setUserId("testuser2");
user.setPassword("testpassword");
user.setUserType("S");

UserDetails userDetails = new UserDetails();
userDetails.setUserFirstName("fname");
/user.setUserDetails(userDetails);
userDetails.setUser(user);
for (int i = 0; i < 4; i++) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx = session.beginTransaction();
session.saveOrUpdate(user);
tx.commit();
}

It works fine for the first time when I load my session, it inserts both user and user_details in the tables.
But once I start a new session and try saving the same user object, it again tries to insert user details object which fails, as there is a already present in the database.
Below is mapping used in .cfg.xml file
<property name="hbm2ddl.auto">update</property>

How to overcome the abopve issue? DO i need to explicitly assign id to user details?Any kind of help will be appreciated here. Thanks

Why do you save it in a loop?? In that case you have to set the ide explicitly.