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JSF Error the class does not have property

Greenhorn

Posts: 2

posted 9 years ago

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I'm trying to add some mysql table columns to JSF table. And I'm getting error:

/index.xhtml: The class 'logon.User' does not have the property 'description'. Please help

User.java

package logon;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="users")
public class User {

private int id;
    public String name = null;
    public String surname = null;
    public String username = null;
    public String description = null;
    public String email = null;

@Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public int getId(){
        return id;
    }
    public void setId(int id){
        this.id = id;
    }

@Column(name = "Name")
    public String getName(){
        return name;
    }

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

@Column(name = "Surname")
    public String getSurname(){
        return surname;
    }

public void setSurname(String Surname){
        this.surname = Surname;
    }

@Column(name = "Username")
    public String getUsername(){
        return username;
    }
    public void setUsername(String Username){
        this.username = Username;
    }
    @Column(name = "Description")
    public String getDescription(){
        return description;
    }

public void setDescription(String Description){
        this.description = Description;
    }

}

LogonTest.java

import javax.annotation.PostConstruct;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ViewScoped;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.persistence.Query;

@ViewScoped
@SessionScoped
@javax.faces.bean.ManagedBean(name = "logonTest")
public class LogonTest implements Serializable {
    @PersistenceUnit(unitName = "Webbeans_RESOURCE_LOCAL")
    private EntityManagerFactory emf;

public List<User> getUserList() {
        return userList;
    }

public void setUserList(List<User> userList) {
        this.userList = userList;
    }

public List<User> userList = new ArrayList();

@PostConstruct
    public void init() {
        EntityManager em = emf.createEntityManager();
        // Read the existing entries and write to console
        Query q = em.createQuery("SELECT u FROM User u");
        userList = q.getResultList();
        System.out.println("Size: " + userList.size());
    }

public LogonTest() {

}

index.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
        >
<h:head>
    <title>index.xhtml</title>
</h:head>

<h:body>

<h1>JSF 2.0 View Data From The Database Table Example</h1>

<h:dataTable value="#{logonTest.userList}" var="u" border="1">

<h:column>
            <f:facet name="header">
                ID
            </f:facet>
            #{u.id}
        </h:column>

<h:column>
            <f:facet name="header">
                Name
            </f:facet>
            #{u.username}
        </h:column>

<h:column>
            <f:facet name="header">
                Surname
            </f:facet>
            #{u.surname}
        </h:column>

<h:column>
            <f:facet name="header">
                Name
            </f:facet>
            #{u.name}
        </h:column>

<h:column>
            <f:facet name="header">
                Description
            </f:facet>
            #{u.description}
        </h:column>

</h:dataTable>

</h:body>

</html>

Tim Holloway

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posted 9 years ago

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It may be my day to miss the obvious, but I cannot see anything in the actual sample code that would result in that error.

However, since the failing object is an EJB and EJBs are internally re-written by the persistence mechanism there's a possibility that by declaring your properties as public (fields) while simultaneously defining accessor methods for them that you're causing the rewrite mechanism to get confused. A persistence object is supposed to be only field-access (via direct public access to the instance variables) or property-access (via the get/set) method, but it shouldn't attempt to be both.

So, in short, you may be seeing a JPA/EJB error, not actually a JSF error.

The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.

You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.