【发布时间】:2012-07-18 17:25:57
【问题描述】:
当我更改第一个下拉列表中的值时,我正在尝试重新呈现第二个下拉列表。 但是当我单击并更改第一个下拉列表中的值时,什么也没有发生。 我是否遗漏了任何关键部分?
我的 xhtml:
<h:form>
<h:selectOneMenu value="#{adminBean.currentLeadCategory}" required="true" styleClass="formfield fpgeo" style="width:20em;margin-right:20px;">
<a4j:support event="onchange" action="#{adminBean.currentLeadCategoryChanged()}"
reRender="componentToReRender"/>
<s:selectItems value="#{leadCategories}" var="leadCategory" label="#{leadCategory.name}" noSelectionLabel="Choose Category"/>
<s:convertEntity/>
</h:selectOneMenu>
<a4j:outputPanel id="componentToReRenderWrapper">
<h:selectOneMenu id="componentToReRender" value="#{adminBean.currentCounty}"
styleClass="formfield fpgeo" style="width:20em;margin-right:20px;">
<s:selectItems value="#{adminBean.counties}" var="county" label="#{county.name}" noSelectionLabel="choose"/>
<s:convertEntity/>
</h:selectOneMenu>
<h:messages/>
</a4j:outputPanel>
</h:form>
我的豆子:
@AutoCreate
@Scope(ScopeType.CONVERSATION)
@Name("adminBean")
@MeasureCalls
@Restrict("#{s:hasRole('admin') or s:hasRole('sales')}")
public class AdminBean implements Serializable {
private LeadCategory currentLeadCategory;
private List<County> counties = new ArrayList<County>();
private County currentCounty;
@Factory(value = "leadCategories", autoCreate = true, scope = ScopeType.SESSION)
public List<LeadCategory> fetchLeadCategories() {
Query query = entityManager.createQuery("select l from LeadCategory l");
return query.getResultList();
}
public LeadCategory getCurrentLeadCategory() {
return currentLeadCategory;
}
public void setCurrentLeadCategory(LeadCategory currentLeadCategory) {
this.currentLeadCategory = currentLeadCategory;
}
public County getCurrentCounty() {
return currentCounty;
}
public void setCurrentCounty(County currentCounty) {
this.currentCounty = currentCounty;
}
public void currentLeadCategoryChanged() {
this.loadCountiesForCategory();
}
public List<County> getCounties() {
return counties;
}
public void setCounties(List<County> counties) {
this.counties = counties;
}
public void loadCountiesForCategory(){
if(currentLeadCategory == null){
counties = new ArrayList<County>();
}
counties = new ArrayList<County>(currentLeadCategory.getCounties());
}
}
编辑 1:
如果我检查萤火虫我得到一个错误:
时间戳:7/19/12 下午 4:14:44
错误:ReferenceError:未定义 A4J
源文件:http://localhost:8080/admin/admin.seam?cid=11
行:1
【问题讨论】:
标签: java seam jsf-1.2 ajax4jsf