[Hibernate-issues] [Hibernate-JIRA] Closed: (HB-125) generator class="assigned", when used in parent-children model's child class

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Message:

   The following issue has been closed.

   Resolver: Gavin King
       Date: Mon, 9 Jun 2003 10:07 PM

unsaved-value="null" is not sensible for assigned ids. Please do NOT report bugs in user code here. JIRA is for bugs in *Hibernate*. TIA
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-125


Here is an overview of the issue:
---------------------------------------------------------------------
        Key: HB-125
    Summary: generator class="assigned", when used in parent-children model's child class
       Type: Bug

     Status: Closed
   Priority: Major
 Resolution: REJECTED

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.0 final

   Assignee: Gavin King
   Reporter: neil yang

    Created: Sun, 8 Jun 2003 10:27 PM
    Updated: Mon, 9 Jun 2003 10:07 PM
Environment: windows xp

Description:
I have two class: Company & Person, they're Parent-children relation-ship. the 2 classes' id are all "assigned", beacause in an other true development env., I had to use programatic "assigned" id. When I run the test code, the exception thrown.

package h;

import java.util.ArrayList;
import java.util.Date;
public class Company {
    static int _lastID = 100;
    String id;
    public void setId(String value) {
        this.id=value;
    }
    public String getId() {
        return id;
    }

    String name;
    public void setName(String value) {
        this.name=value;
    }
    public String getName() {
        return name;
    }

    ArrayList partners = new ArrayList();
    public String[] getMyPartners(){
      return (String[])partners.toArray(new String[partners.size()]);
    }
    public void setMyPartners(String[] parts){
        partners.clear();
        for(int i=0; i<parts.length; i++){
            partners.add(parts[i]);
        }
    }

    java.util.Date createdDate;
    public void setCreatedDate(Date d ){
        this.createdDate = d;
    }
    public Date getCreatedDate(){
        return this.createdDate;
    }
    java.util.List employees=new java.util.ArrayList();
    public void setEmployees(java.util.List value) {
        this.employees=value;
    }
    public java.util.List getEmployees() {
        return employees;
    }
    public void addEmployee(h.Person value) {
        employees.add(value);
    }
    public void removeEmployee(h.Person value) {
        employees.remove(value);
    }
    public void clearEmployees() {
        employees.clear();
    }
    private boolean _registered;
    public boolean getRegistered(){
        return this._registered;
    }
    public void setRegistered(boolean val){
        this._registered = val;
    }


}

Company.hbm.xml:
<?xml version="1.0" encoding="GB2312"?>
<!DOCTYPE hibernate-mapping SYSTEM "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >
<hibernate-mapping>

	<class name="h.Company">
		<id name = "id" unsaved-value = "null">
			<generator class="assigned"/>
		</id>		
        <property name="name"/>
        <property name="myPartners" type="serializable" />
        <property name="registered" type="boolean"/>
	    <bag name="employees" cascade="all">
            <key column="company_id"/>
            <one-to-many class="h.Person"/>
        </bag>
	</class>
</hibernate-mapping>


package h;

import java.io.Serializable;

public class Person implements Serializable{
    public static int _lastID = 1000;
    String name;

/**
Sets the value of field name.
@param name value of field name
*/

    public void setName(String value) {
        this.name=value;
    }

/**
Gets the value of field name.
@return value of field name
*/

    public String getName() {
        return name;
    }

    String address;

/**
Sets the value of field address.
@param address value of field address
*/
    public void setAddress(String value) {
        this.address=value;
    }

/**
Gets the value of field address.
@return value of field address
*/

    public String getAddress() {
        return address;
    }

    String id ;

/**
Sets the value of field id.
@param id value of field id
*/

    public void setId(String value) {
        this.id=value;
    }

/**
Gets the value of field id.
@return value of field id
*/

    public String getId() {
        return id;
    }
}

Person.hbm.xml:
<?xml version="1.0" encoding="GB2312"?>
<!DOCTYPE hibernate-mapping SYSTEM "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >
<hibernate-mapping>

	<class name="h.Person">
		<id name = "id" unsaved-value = "null">
               <generator class="assigned"/>
		</id>
		<property name="name"/>
		<property name="address"/>
	</class>
</hibernate-mapping>

the Test code is:

package h;

import net.sf.hibernate.Session;
import net.sf.hibernate.Transaction;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.Query;
import net.sf.hibernate.cfg.Configuration;
import net.sf.hibernate.tool.hbm2ddl.SchemaExport;

import java.util.List;
import java.util.Iterator;



class TestCompany
{

    private static SessionFactory sessions;

    public static void main(String[] args) throws Exception
    {

        String[] partners = {
            "IBM",
            "Microsoft",
            "Lenovo",
            "Apple"
        };

        
        Configuration conf = new Configuration()
                .addClass(Person.class)
                .addClass(Company.class);

        
        SchemaExport dbExport = new SchemaExport(conf);
        dbExport.setOutputFile("sql.txt");
        dbExport.create(true, true);

        sessions = conf.buildSessionFactory();
        
         //start......
        Session s = sessions.openSession();
        Transaction t = s.beginTransaction();

        Company c = new Company();
        c.setName("UFSoft Company Ltd.");
        c.setMyPartners(partners);
        c.setRegistered(true);

        Person p1 = new Person();
        p1.setId(String.valueOf(Person._lastID++));
        p1.setName("Liuto");
        p1.setAddress("Beijing Haidian");

        Person p2 = new Person();
        p2.setId(String.valueOf(Person._lastID++));
        p2.setName("sun");
        p2.setAddress("beijing shangdi");

        c.addEmployee(p1);
        c.addEmployee(p2);

      
         c.setId(String.valueOf(Company._lastID++));
        //c.setId(Company._lastID++);
        s.save(c);

        s.flush();
        t.commit();


        s.close();
        sessions.close();
    }
}

when flush(), the bug reported:
net.sf.hibernate.HibernateException: SQL update or deletion failed (row not found)
	at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:25)
	at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:611)
	at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:580)
	at net.sf.hibernate.impl.ScheduledUpdate.execute(ScheduledUpdate.java:27)
	at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2073)
	at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2046)
	at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:1989)
	at h.TestCompany.main(TestCompany.java:115)




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