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Я пытаюсь обновить значение строки, отредактированной на datatable (editable = true, row edition). Но я всегда получаю старую ценность через слушателя. Можете ли вы рассказать мне, где моя ошибка? ТКС ..p: dataTable RowEdit сохранение старых значений
Вот код:
<?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"
xmlns:p="http://primefaces.org/ui">
<ui:composition template="_template.xhtml">
<ui:define name="conteudo">
<h:form id="certificacao" >
<p:messages globalOnly="false" showSummary="true" showDetail="true" />
<p:growl id="messages" autoUpdate = "true"/>
<p:fieldset legend="Dados da Certificação">
<h:panelGrid columns="3" >
<p:outputLabel value="Nome da Certificação:" for="nomeCertificacao" style="font-weight:bold"/>
<p:inputText id="nomeCertificacao" value="#{certificacaoBean.certificacao.nomeCertificacao}"
required="true" requiredMessage="Nome da certificação não preenchido" >
</p:inputText>
<br/>
<h:outputLabel value="Descrição da Certificação:" for="descCertificacao" style="font-weight:bold"/>
<p:inputText id="descCertificacao" value="#{certificacaoBean.certificacao.descCertificacao}">
</p:inputText>
<br/>
<p:commandButton value="Gravar" action="#{certificacaoBean.gravar}" icon="fa fa-fw fa-save"
process="@this certificacao" update="@form certificacao" />
<br/>
</h:panelGrid>
</p:fieldset>
<p:dataTable
value="#{certificacaoBean.certificacoes}"
var="certificacao"
id="tabelaCertificacoes"
emptyMessage="Nenhuma certificação cadastrada"
editable="true"
style="margin-bottom:0px"
filteredValue="#{certificacaoBean.certificacaoSelecionada}"
widgetVar="tabelaCertificacoes">
<p:ajax event="rowEdit" listener="#{certificacaoBean.onRowEdit}" update=":certificacao:messages"/>
<p:ajax event="rowEditCancel" listener="#{certificacaoBean.onRowCancel}" update=":certificacao:messages" />
<p:column
headerText="Certificação"
filterBy="#{certificacao.nomeCertificacao}"
filterMatchMode="contains">
<p:cellEditor>
<f:facet name="output">
<div align="center">
<h:outputText value="#{certificacao.nomeCertificacao}" />
</div>
</f:facet>
<f:facet name="input">
<p:inputText value="#{certificacao.nomeCertificacao}" style="width:100%" label="Certificação"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Descrição" filterBy="#{certificacao.descCertificacao}" filterMatchMode="contains">
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{certificacao.descCertificacao}" /></f:facet>
<f:facet name="input"><p:inputText value="#{certificacao.descCertificacao}" style="width:100%" label="Descrição"/></f:facet>
</p:cellEditor>
</p:column>
<p:column style="width:3px">
<p:rowEditor />
</p:column>
<p:column style="width:3px">
<f:facet name="header">
<h:outputText value="" style="width:3px"/>
</f:facet>
<p:commandButton
action="#{certificacaoBean.removeCertificacao(certificacao)}"
icon="ui-icon-close"
title="Remover Certificação"
update="tabelaCertificacoes"
process="@this" >
<f:setPropertyActionListener
target="#{certificacaoBean.certificacaoSelecionada}"
value="#{certificacao}" />
</p:commandButton>
</p:column>
</p:dataTable>
</h:form>
</ui:define>
боб часть:
import java.io.Serializable;
import java.util.List;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import org.primefaces.event.CellEditEvent;
import org.primefaces.event.RowEditEvent;
import br.com.dao.DAO;
import br.com.model.Certificacao;
@ManagedBean(name="certificacaoBean")
@ViewScoped
public class CertificacaoBean implements Serializable {
private static final long serialVersionUID = 1L;
private Certificacao certificacao = new Certificacao();
public void setCertificacao(Certificacao certificacao) {
this.certificacao = certificacao;
}
private Certificacao certificacaoSelecionada;
public Certificacao getCertificacao() {
return certificacao;
}
public Certificacao getCertificacaoSelecionada() {
return certificacaoSelecionada;
}
public void setCertificacaoSelecionada(Certificacao certificacaoSelecionada) {
this.certificacaoSelecionada = certificacaoSelecionada;
}
public void removeCertificacao(Certificacao certificacao) {
new DAO<Certificacao>(Certificacao.class).remove(certificacaoSelecionada);
FacesMessage msg = new FacesMessage("Certificação excluída","");
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public List<Certificacao> getCertificacoes() {
return new DAO<Certificacao>(Certificacao.class).listaTodos();
}
public void gravar() {
System.out.println("Gravando Certificação " + this.certificacao.getNomeCertificacao());
if (certificacao.getNomeCertificacao().isEmpty()) {
FacesContext.getCurrentInstance().addMessage ("nomeCertificacao",
new FacesMessage(FacesMessage.SEVERITY_ERROR,
"O nome da certificação deve ser preenchido.", "O nome da certificação deve ser preenchido."));
return;
}
new DAO<Certificacao>(Certificacao.class).adiciona(this.certificacao);
this.certificacao = new Certificacao();
}
// Inicio Editor na Tabela
public void onRowEdit(RowEditEvent event) {
System.out.println("Passando no DAO retorno event Cod: " + ((((Certificacao) event.getObject()).getCodigoCertificacao())));
System.out.println("Passando no DAO retorno event Name: " + ((((Certificacao) event.getObject()).getNomeCertificacao())));
System.out.println("Passando no DAO retorno object: " + ((((Certificacao) event.getObject()))));
System.out.println("DAO evento " + event);
//new DAO<Certificacao>(Certificacao.class).adiciona(this.certificacao);
//Problema AQUI
new DAO<Certificacao>(Certificacao.class).atualiza((((Certificacao) event.getObject())));
this.certificacao = new Certificacao();
FacesMessage msg = new FacesMessage("Certificação editada", String.valueOf((((Certificacao) event.getObject()).getCodigoCertificacao())));
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public void onRowCancel(RowEditEvent event) {
FacesMessage msg = new FacesMessage("Edição cancelada", String.valueOf((((Certificacao) event.getObject()).getCodigoCertificacao())));
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public void onCellEdit(CellEditEvent event) {
Object oldValue = event.getOldValue();
Object newValue = event.getNewValue();
if(newValue != null && !newValue.equals(oldValue)) {
FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, "Cell Changed", "Old: " + oldValue + ", New:" + newValue);
FacesContext.getCurrentInstance().addMessage(null, msg);
}
}
}
И дао:
package br.com.dao;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaQuery;
public class DAO<T> {
private final Class<T> classe;
public DAO(Class<T> classe) {
this.classe = classe;
}
public void adiciona(T t) {
// consegue a entity manager
EntityManager em = new JPAUtil().getEntityManager();
// abre transacao
em.getTransaction().begin();
// persiste o objeto
em.persist(t);
// commita a transacao
em.getTransaction().commit();
// fecha a entity manager
em.close();
}
public void remove(T t) {
EntityManager em = new JPAUtil().getEntityManager();
em.getTransaction().begin();
em.remove(em.merge(t));
em.getTransaction().commit();
em.close();
}
public void atualiza(T t) {
EntityManager em = new JPAUtil().getEntityManager();
em.getTransaction().begin();
em.merge(t);
em.getTransaction().commit();
em.close();
}
public List<T> listaTodos() {
EntityManager em = new JPAUtil().getEntityManager();
CriteriaQuery<T> query = em.getCriteriaBuilder().createQuery(classe);
query.select(query.from(classe));
List<T> lista = em.createQuery(query).getResultList();
em.close();
return lista;
}
public T buscaPorId(Integer id) {
EntityManager em = new JPAUtil().getEntityManager();
T instancia = em.find(classe, id);
em.close();
return instancia;
}
public int contaTodos() {
EntityManager em = new JPAUtil().getEntityManager();
long result = (Long) em.createQuery("select count(n) from certificacao n")
.getSingleResult();
em.close();
return (int) result;
}
public List<T> listaTodosPaginada(int firstResult, int maxResults) {
EntityManager em = new JPAUtil().getEntityManager();
CriteriaQuery<T> query = em.getCriteriaBuilder().createQuery(classe);
query.select(query.from(classe));
List<T> lista = em.createQuery(query).setFirstResult(firstResult)
.setMaxResults(maxResults).getResultList();
em.close();
return lista;
}
}
[mcve] и ваше название не умное ... «не работает ...»? – Kukeltje
Нет ошибки, это просто не обновляет значение ... Как и listerner, вы не получаете обновленное значение в форме в строке datatable. – Warl
@Warl попробуйте удалить required = "true в inputText и сделать то, что говорит мой ответ, также –