Jsf 2 javax.el.PropertyNotFoundException在提交ui时：使用不同子类的条件呈现属性重复

在我的支持bean中，我有一个共享公共接口的不同子类的对象集合。在视图中，一个

ui:repeat

迭代此集合。在这个循环中，必须根据接口的具体实现呈现不同的属性

我将问题归结为以下支持bean：

@Named
@SessionScoped
public class DummyBean implements Serializable {
    private List<Type> objects = new ArrayList<Type>();

    public void add1() {
        objects.add(new Type1());
    }

    public void add2() {
        objects.add(new Type2());
    }

    public void remove(Type o) {
        objects.remove(o);
    }

    // Getter.
}

公共类Type2实现类型{
@凌驾
公共字符串getType（）{return“2”；}
// ...
}

在视图中，我希望迭代存储在

DummyBean

中的所有对象，并显示它们的内容。根据对象的具体类型，仅在类

Type1

中实现的方法可以使用条件呈现的

rendered

-属性调用：

<h:form id="dummyForm">
  <ui:repeat value="#{dummyBean.objects}" var="_obj" >
    <h:outputText value="Type of the Object is #{_obj.type}." />
    <h:panelGroup rendered="#{_obj.type eq '1'}">
      <ui:repeat value="#{_obj.type1OnlyMethod}" var="_oneOnlyObject" varStatus="_status" >
        <h:outputText value="#{_oneOnlyObject}" />
      </ui:repeat>
    </h:panelGroup>
    <h:commandLink value="remove" action="#{dummyBean.remove(_obj)}">
      <f:ajax render="dummyForm" />
    </h:commandLink>
    <br/>
  </ui:repeat>

  <h:commandLink value="add1" action="#{dummyBean.add1}">
    <f:ajax render="dummyForm" />
  </h:commandLink>
  <br/>
  <h:commandLink value="add2" action="#{dummyBean.add2}">
    <f:ajax render="dummyForm" />
  </h:commandLink>
</h:form>

似乎在渲染响应阶段，对当前删除的

Type2

对象“执行”嵌套的

ui:repeat

如果我删除第二个（嵌套的）

ui:repeat

并添加一些普通的

h:outputText

以访问仅在

Type1

中可用的属性，则在添加或删除元素时，一切都会正常工作：

<h:form id="dummyForm">
  <ui:repeat value="#{dummyBean.objects}" var="_obj" >
    <!-- ... -->
    <h:panelGroup rendered="#{_obj.type eq '1'}">
      <h:outputText value="#{_obj.type1OnlyMethod.size()}" />
    </h:panelGroup>
    <!-- ... -->
</h:form>

有人对这个话题有什么想法吗

---

（在JEE7应用服务器（Wildfly 8.0.0.Final）上运行）

这是由Mojarra的

状态管理中的错误引起的，根据我的同事Arjan Tijms的报告，该错误已修复。在（

LinkBlock

、

ImageBlock

、

TextBlock

和

FeedBlock

）对不同的

块

实例进行迭代时，我们也遇到了这个问题。该修复程序在JSF2.0/2.1中提供，并可用于根据进行后端口的JSF2.0/2.1。因此，至少升级到该版本（或根据提供的最新版本）就可以了

---

否则，最好的办法是用

替换

。在我的情况下，我没有升级Mojarra版本的选项，为了避免c:forEach（与ui可选呈现组件一起使用时会导致许多副作用），我用p:dataList替换了ui:repeat，它成功了。你将不得不做一些CSS样式来隐藏子弹，但我认为这是值得的价格。我希望它能帮助别人；）

2014-03-24 15:42:46,754 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (default task-11) Error Rendering View[/transition/beginTestSite.xhtml]:
   javax.el.PropertyNotFoundException: /transition/beginTestSite.xhtml @23,96 value="#{_obj.type1OnlyMethod}": The class 'at.co.xss.Type2' does not have the property 'type1OnlyMethod'.
        at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:111) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.facelets.component.UIRepeat.getValue(UIRepeat.java:279) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.facelets.component.UIRepeat.getDataModel(UIRepeat.java:255) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.facelets.component.UIRepeat.setIndex(UIRepeat.java:523) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.facelets.component.UIRepeat.doVisitChildren(UIRepeat.java:790) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.facelets.component.UIRepeat.visitTree(UIRepeat.java:748) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at com.sun.faces.facelets.component.UIRepeat.visitTree(UIRepeat.java:754) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.component.UIForm.visitTree(UIForm.java:371) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at com.sun.faces.application.view.FaceletPartialStateManagementStrategy.saveView(FaceletPartialStateManagementStrategy.java:472) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.application.StateManagerImpl.saveView(StateManagerImpl.java:89) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.application.StateManager.getViewState(StateManager.java:593) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at com.sun.faces.context.PartialViewContextImpl.renderState(PartialViewContextImpl.java:486) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:328) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57) [primefaces-4.0.jar:4.0]
        at org.richfaces.context.ExtendedPartialViewContextImpl.processPartial(ExtendedPartialViewContextImpl.java:218) [richfaces-core-impl-4.3.5.Final.jar:4.3.5.Final]
        at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:1004) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:435) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) [jboss-jsf-api_2.2_spec-2.2.5.jar:2.2.5]
        at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.2.2.jar:1.2.2]
        at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.2.2.jar:1.2.2]
        at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.2.jar:1.2.2]
        at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.2.jar:1.2.2]
        at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.2.2.jar:1.2.2]
        at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.2.2.jar:1.2.2]
        at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.2.jar:1.2.2]
        at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:56) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.security.handlers.AuthenticationCallHandler.handleRequest(AuthenticationCallHandler.java:52) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:168) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:687) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
        at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
Caused by: javax.el.PropertyNotFoundException: The class 'at.co.xss.Type2' does not have the property 'type1OnlyMethod'.
        at javax.el.BeanELResolver.getBeanProperty(BeanELResolver.java:730) [javax.el-3.0.0.jar:3.0.0]
        at javax.el.BeanELResolver.getValue(BeanELResolver.java:351) [javax.el-3.0.0.jar:3.0.0]
        at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203) [jsf-impl-2.2.5-jbossorg-3.jar:]
        at com.sun.el.parser.AstValue.getValue(AstValue.java:140) [javax.el-3.0.0.jar:3.0.0]
        at com.sun.el.parser.AstValue.getValue(AstValue.java:204) [javax.el-3.0.0.jar:3.0.0]
        at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226) [javax.el-3.0.0.jar:3.0.0]
        at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
        at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
        at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109) [jsf-impl-2.2.5-jbossorg-3.jar:]
        ... 66 more

<h:form id="dummyForm">
  <ui:repeat value="#{dummyBean.objects}" var="_obj" >
    <!-- ... -->
    <h:panelGroup rendered="#{_obj.type eq '1'}">
      <h:outputText value="#{_obj.type1OnlyMethod.size()}" />
    </h:panelGroup>
    <!-- ... -->
</h:form>