Error using EntityHome.update with selectOneMenu and selectManyListbox

05. May 2008, 23:10 CET | Link István Madarász

Hello!

I'm getting an error while trying to update an entity through EntityHome using a JSF form containing selectOneMenu and selectManyListbox.

The error:

sourceId=modositProjekt:pdolgozo[severity=(ERROR 2), summary=(value is not valid), detail=(value is not valid)]
sourceId=modositProjekt:pvezeto[severity=(ERROR 2), summary=(value is not valid), detail=(value is not valid)]

Sorry for the Hungarian variable/entity names, I hope you will get it. The main idea that there are two entities: Project (Projekt) and Worker (Dolgozo). Each Project has a leader and several team members (tagok) which are Worker (Dolgozo) objects. I would like to select the leader with a selectOneMenu and the team members with the selectManyListbox. Right now, the edit form gets the data but I unable the make updates because of the error.

JSF form:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
                             "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:s="http://jboss.com/products/seam/taglib"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                xmlns:h="http://java.sun.com/jsf/html"
                template="layout/template.xhtml">
                       
<ui:define name="body">

    <h2>Projekt modositasa</h2>
    
    <h:messages globalOnly="true" styleClass="message"/>
    
    <h:form id="modositProjekt">
    	<table border="0">
       	<s:validateAll>
         	<tr>
           		<td>Projekt vezeto</td>
	            <td>
	            	<h:selectOneMenu value="#{projektHome.instance.vezeto}" id="pvezeto">
	   					<s:selectItems value="#{projektvezetok}" var="pvezeto" label="#{pvezeto.username}" />
   						<s:convertEntity/> 
					</h:selectOneMenu>
	            </td>
         	</tr>
         	<tr>
 		       <td>Projekttagok</td>
	        	 <td>
    
               <h:selectManyListbox value="#{projektHome.instance.tagok}" id="pdolgozo">
   					<s:selectItems value="#{projektdolgozok}" var="pdolgozo" label="#{pdolgozo.username}" />
   					<s:convertEntity/> 
				</h:selectManyListbox>
          	</td>
         </tr>
       	</s:validateAll>
        </table>
        <div class="actionButtons">
           <h:commandButton id="modisitProjekt" value="Modositas" 
                action="#{projektHome.update}"/>     			  
        </div>
    </h:form>
    
</ui:define>

</ui:composition>

Dolgozo class:

@Entity
@Name("dolgozo")
@Table(name="dolgozok")
public class Dolgozo implements Serializable {
	
	private static final long serialVersionUID = 1310777667340045513L;
	@Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id;
	private Long kulsoid;
	private String username;
	private String jelszo;
	private Byte rang;
	
	// konstruktor
	public Dolgozo() {}
	public Dolgozo(Long id)
	{
		this.id = id;
	}
	
	// equals, hash override
	@Override public boolean equals(Object obj)
	{
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		final Dolgozo other = (Dolgozo) obj;
		if (id != other.id)
			return false;
		return true;
	}
	@Override
	public int hashCode() {
		final long PRIME = 31;
		long result = 1;
		result = PRIME * result + this.id;
		return (int)result;
	}
	// getter/setter
...
}
	

Projekt class:

@Entity
@Name("projekt")
@Table(name="projektek")
public class Projekt implements Serializable {

	private static final long serialVersionUID = -4958586845730005066L;
	@Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id;
	@Length(max=40) private String nev;
	private String leiras;
	@ManyToOne private Dolgozo vezeto;
	@ManyToMany(targetEntity = Dolgozo.class, fetch =	FetchType.LAZY) 
	private List<Dolgozo> tagok;
	@OneToMany(mappedBy="projekt", targetEntity = Feladat.class, 
				fetch =	FetchType.LAZY) 
	private List<Feladat> feladatok;
	private Date kezdet;
	private Date tervvege;
	private Date becsultvege;
	private Long bekerkoltseg;
	private Long tervbevetel;
	
	// konstruktor
	public Projekt() {}
	public Projekt(Long id, String nev, String leiras, Dolgozo vezeto, 
					List<Dolgozo> tagok, Date kezdet, Date tervvege, Date becsultvege,
					Long bekerkoltseg, Long tervbevetel, List<Feladat> feladatok)
	{
		this.id = id;
		this.nev = nev;
		this.leiras = leiras;
		this.vezeto = vezeto;
		this.tagok = tagok;
		this.feladatok = feladatok;
		this.kezdet = kezdet;
		this.tervvege = tervvege;
		this.becsultvege = becsultvege;
		this.bekerkoltseg = bekerkoltseg;
		this.tervbevetel = tervbevetel;
	}
	
	// equalsm hash override
	@Override public boolean equals(Object obj)
	{
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		final Projekt other = (Projekt) obj;
		if (id != other.id)
			return false;
		return true;
	}
	@Override
	public int hashCode() {
		final long PRIME = 31;
		long result = 1;
		result = PRIME * result + this.id;
		return (int)result;
	}

	// getter/setter
...
}

ProjektHome:

@Name("projektHome")
public class ProjektHome extends EntityHome<Projekt>
{

    @RequestParameter 
    Long projektId;
    
    @Override
    public Object getId() 
    { 
        if (projektId==null)
        {
            return super.getId();
        }
        else
        {
            return projektId;
        }
    }
        
    @Override @Begin
    public void create() {
        super.create();
    }
 	
}

When I was doing the new project form I got the very same error. That time the solution was to add an equals and hash override to the Dolgozok class. There's a similarity with the two problems but I don't know how to solve this one.

Any ideas? Thanks!