Many-to-one mapping problem

lesha · **Posted:** Mon Jul 19, 2004 9:56 am

Hi!
I use long-Datatypes for IDs. Inserting Mitspieler doesn't make a problem, but inserting a Tippgemeinschaft does:
No persister for: java.lang.Long
A Mitspieler(Player) can have several Teams (Tippgemeinschaft) to manage and a Team must have an admin.
Is my relation-mapping wrong?
Hier is my mapping file:

Code:

<class name="tippspiel.Mitspieler" table="MITSPIELER">

       <id name="id" type="long" unsaved-value="null">
         <column name="ID" sql-type="bigint(20)" not-null="true"/>
         <generator class="native"/>
      </id>

            
       <set name="adminTippgemeinschaften" inverse="true" lazy="true" cascade="all-delete-orphan">
           
            <key column="ADMIN_ID"/>
            <one-to-many class="tippspiel.Tippgemeinschaft"/>
         </set> </class>


<class name="tippspiel.Tippgemeinschaft" table="TIPPGEMEINSCHAFT">
      <id name="id" type="long" unsaved-value="null">
         <column name="ID" sql-type="bigint(20)" not-null="true"/>
         <generator class="native"/>
      </id>
      
      
      <many-to-one name= "adminId" class = "tippspiel.Mitspieler" column="ADMIN_ID" not-null="true" unique="true"/>        </class>
   

Lena

anthony · **Posted:** Mon Jul 19, 2004 10:00 am

change

Quote:

to

Quote:

long is not Long ....

anthony · **Posted:** Mon Jul 19, 2004 10:06 am

Quote:

long cannot be null, Long can... show your pojo

lesha · **Posted:** Mon Jul 19, 2004 10:11 am

What does pojo mean?
Lena

anthony · **Posted:** Mon Jul 19, 2004 10:16 am

oups, show javaBean

i mean if you have in your bean

private Long id; (typically unsaved-value = null)

it is not the same as
private long id; (typically unsaved-value = 0)

lesha · **Posted:** Mon Jul 19, 2004 10:34 am

I tried to insert an new Mitspieler:

Code:

Transaction tx = session.beginTransaction();

         Mitspieler tom = new Mitspieler();
         tom.setName("Banny");
         tom.setEmail("banny@gmx.de");
         tom.setPasswort("secret^2!");

         session.save(tom);
         tx.commit();

My DB got "Banny" and I've got this:
identifier of an instance of tippspiel.Mitspieler altered from 16 to 0
And hier are my pojos :) :

Code:

public class Mitspieler {
   private int id;
   private String name;
   private String email;
   private String passwort;
   private Set adminTippgemeinschaften;
   ...}

public class Tippgemeinschaft {
   private int id;
   private String name;
   private int adminId;
                ...}

Lena

lesha · **Posted:** Mon Jul 19, 2004 10:35 am

Oh sorry! I changed long to int to test!

lesha · **Posted:** Mon Jul 19, 2004 10:41 am

I have too much disorder in my code... Some methods were with int-Datatypes. Sorry. Last error does not occur anymore.
Thanks!

lesha · **Posted:** Mon Jul 19, 2004 10:45 am

So. I updated my classes. And here I am again with:
No persister for: java.lang.Long
tom is a Mitspieler.

Code:

Transaction tx3 = session.beginTransaction();
         
                  Tippgemeinschaft hsv = new Tippgemeinschaft();
                  hsv.setName("HSV Fanclub");
                  hsv.setAdminId(tom.getId());
                     session.save(hsv);
                                    tx3.commit();

Lena