Minha classe LivroBean:
package br.com.caelum.livraria.bean;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import br.com.caelum.livraria.dao.DAO;
import br.com.caelum.livraria.modelo.Autor;
import br.com.caelum.livraria.modelo.Livro;
@ManagedBean
@ViewScoped
public class LivroBean {
private Livro livro = new Livro();
private Integer autorId;
public void setAutorId(Integer autorId) {
this.autorId = autorId;
}
public Integer getAutorId() {
return autorId;
}
public Livro getLivro() {
return livro;
}
public List<Autor> getAutores() {
return new DAO<Autor>(Autor.class).listaTodos();
}
public void gravarAutor() {
Autor autor = new DAO<Autor>(Autor.class).buscaPorId(this.autorId);
this.livro.adicionaAutor(autor);
System.out.println("Livro do autor " + autor.getNome());
}
public void gravar() {
System.out.println("Gravando livro " + this.livro.getTitulo());
if (livro.getAutores().isEmpty()) {
throw new RuntimeException("Livro deve ter pelo menos um Autor.");
}
new DAO<Livro>(Livro.class).adiciona(this.livro);
}
}Meu livro.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">
<h:body>
<h1>Novo Livro</h1>
<h:form>
<fieldset>
<legend>Dados do Livro</legend>
<h:panelGrid columns="2">
<h:outputLabel value="Titulo:" for="titulo" />
<h:inputText id="titulo" value="#{livroBean.livro.titulo}" />
<h:outputLabel value="ISBN:" for="isbn" />
<h:inputText id="isbn" value="#{livroBean.livro.isbn}" />
<h:outputLabel value="Preço:" for="preco" />
<h:inputText id="preco" value="#{livroBean.livro.preco}" />
<h:outputLabel value="Data de Lançamento:" for="dataLancamento" />
<h:inputText id="dataLancamento"
value="#{livroBean.livro.dataLancamento}" />
</h:panelGrid>
</fieldset>
<fieldset>
<legend>Dados do Autor</legend>
<h:outputLabel value="Selecione Autor:" for="autor"/>
<h:selectOneMenu>
<f:selectItems value="#{livroBean.autores}" var="autor"
itemLabel="#{autor.nome}" itemValue="#{autor.id}" />
</h:selectOneMenu>
<h:commandButton value="Gravar Autor" action="#{livroBean.gravarAutor}"/>
</fieldset>
<h:commandButton value="Gravar" action="#{livroBean.gravar}" />
</h:form>
</h:body>
</html>Erro no console:
Hibernate: select autor0_.id as id1_, autor0_.nome as nome1_ from Autor autor0_
Hibernate: select autor0_.id as id1_, autor0_.nome as nome1_ from Autor autor0_
Jul 13, 2017 4:19:44 PM com.sun.faces.lifecycle.InvokeApplicationPhase execute
WARNING: #{livroBean.gravarAutor}: java.lang.IllegalArgumentException: id to load is required for loading
javax.faces.FacesException: #{livroBean.gravarAutor}: java.lang.IllegalArgumentException: id to load is required for loading
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:117)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:791)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1256)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: javax.faces.el.EvaluationException: java.lang.IllegalArgumentException: id to load is required for loading
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:101)
... 27 more
Caused by: java.lang.IllegalArgumentException: id to load is required for loading
at org.hibernate.event.spi.LoadEvent.<init>(LoadEvent.java:87)
at org.hibernate.event.spi.LoadEvent.<init>(LoadEvent.java:59)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2421)
at org.hibernate.internal.SessionImpl.get(SessionImpl.java:974)
at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:807)
at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:781)
at br.com.caelum.livraria.dao.DAO.buscaPorId(DAO.java:67)
at br.com.caelum.livraria.bean.LivroBean.gravarAutor(LivroBean.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.el.parser.AstValue.invoke(AstValue.java:279)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:273)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 28 more
Jul 13, 2017 4:19:44 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/livraria] threw exception [java.lang.IllegalArgumentException: id to load is required for loading] with root cause
java.lang.IllegalArgumentException: id to load is required for loading
at org.hibernate.event.spi.LoadEvent.<init>(LoadEvent.java:87)
at org.hibernate.event.spi.LoadEvent.<init>(LoadEvent.java:59)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2421)
at org.hibernate.internal.SessionImpl.get(SessionImpl.java:974)
at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:807)
at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:781)
at br.com.caelum.livraria.dao.DAO.buscaPorId(DAO.java:67)
at br.com.caelum.livraria.bean.LivroBean.gravarAutor(LivroBean.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.el.parser.AstValue.invoke(AstValue.java:279)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:273)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:101)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:791)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1256)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
