我想动态添加 Primefaces 组件。我正在使用类似于这个的解决方案,这在前面已经讨论过:
<h:form>
<h:panelGrid columns="2">
<p:dataGrid id="categoriesGrid" value="#{bean.categories}"
var="categoryBean" rowIndexVar="rowIndex">
<p:column>
<p:selectOneMenu id="categorySelect" effect="drop"
value="#{categoryBean.selectedCategory}" >
<f:selectItems value="#{categoryBean.availableCategories}"
var="category" itemLabel="#{category.name}"
itemValue="#{category}" />
</p:selectOneMenu>
</p:column>
</p:dataGrid>
<p:commandButton actionListener="#{bean.addNewCategory}"
value="Add category" update="categoriesGrid"/>
</h:panelGrid>
</h:form>
但它有问题。单击“添加类别”按钮后,我得到了响应示例:
<?xml version='1.0' encoding='UTF-8'?>
<partial-response>
<error>
<error-name>
class javax.faces.component.UpdateModelException
</error-name>
<error-message>
<![CDATA[/createTutorial.xhtml @85,65 value=
"#{categoryBean.selectedCategory}":java.util.NoSuchElementException]]>
</error-message>
</error>
</partial-response>
提前致谢