Hibernate Community • View topic - Composite PK that double as foreign

View unanswered posts | View active topics

Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]

Composite PK that double as foreign

Page 1 of 1

[ 1 post ]

Previous topic | Next topic

Author

Message

mangelo

Post subject: Composite PK that double as foreign

Posted: Fri Feb 29, 2008 1:56 pm

Beginner

Joined: Thu Aug 17, 2006 12:44 pm
Posts: 22
Location: Ohio

The location table has a PK made up of 3 FK fields. The only way that I can successfully add a row to the location table is if I save the customer, email, and phone records first, build the LocationId myself, associate it to the location class and then call session.save(location).

Is this normal for composite PK tables?

Code:

         Phone phone = new Phone();
         phone.setPhoneNumber("330-555-1212");
         session.save(phone);
         
         Email email = new Email();
         email.setEmailAddr("johndoe@usa.net");         
         session.save(email);
         
         Location loc = new Location();         
         LocationId id = new LocationId(cust, email, phone);   
         loc.setId(id);
         loc.setAddress("999 Third Street");
         loc.setCity("Younstown");
         loc.setName("Younstown Office");
         loc.setState("OH");
         loc.setZip("44514");
         
         session.save(loc);      
...

                        // To access I have to go through the id.

         Customer c = (Customer)session.load(Customer.class, 1);
         for (Iterator i = c.getLocations().iterator(); i.hasNext();) {
            Location loc = (Location)i.next();
            System.out.println(loc.getAddress());
            
            System.out.println(loc.getId().getEmail().getEmailAddr());
            System.out.println(loc.getId().getPhone().getPhoneNumber());
         }
         

Hibernate version: 3.1

Mapping documents:

Code:

<hibernate-mapping>
    <class name="maa.hibernate.Location" table="location" catalog="accounting">
        <composite-id name="id" class="maa.hibernate.LocationId">
            <key-many-to-one name="customer" class="maa.hibernate.Customer">
                <column name="customer_id" />
            </key-many-to-one>
            <key-many-to-one name="email" class="maa.hibernate.Email">
                <column name="email_id" />
            </key-many-to-one>
            <key-many-to-one name="phone" class="maa.hibernate.Phone">
                <column name="phone_id" />
            </key-many-to-one>
        </composite-id>
        <property name="name" type="java.lang.String">
            <column name="name" length="45" not-null="true" />
        </property>
        <property name="address" type="java.lang.String">
            <column name="address" length="45" not-null="true" />
        </property>
        <property name="city" type="java.lang.String">
            <column name="city" length="30" not-null="true" />
        </property>
        <property name="state" type="java.lang.String">
            <column name="state" length="2" not-null="true" />
        </property>
        <property name="zip" type="java.lang.String">
            <column name="zip" length="10" not-null="true" />
        </property>      
        
    </class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:
MySQL 5.0 InnoDB

Top

Page 1 of 1

[ 1 post ]

Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum