<f:selectItems itemDescription> does not work

问题

I have there code

<p:selectOneMenu id="starter" value="#{reportRegisterManagedBean.starter}" style="width:160px" converter="#{reportStarterConverter}">
<f:selectItem itemLabel="Select Report Starter" itemValue="0"
itemDescription="TEST" />
<f:selectItems
value="#{reportRegisterManagedBean.startersSelectItems}" var="ds" itemLabel="#{ds.name}" itemValue="#{ds}" itemDescription="#{ds.description}" />
</p:selectOneMenu>

here itemDescription="TEST" atribute works very well in <f:selectItem> tag. but itemDescription="#{ds.description}" not working in <f:selectItems> tag.

is here bug?

回答1:

f:selectItems requires a List which you define in our bean like this:

List<SelectItem> list = new LinkedList<SelectItem>();
list.add(new SelectItem("this will be the return value -> itemValue", "this will be the display value -> itemLable"));

If you do so, you don't even need itemValue or itemDescription, because it's already defined in the list.

Update(note: you don't need itemValue, itemDescription):

In your xhtml page it would look like this:

<p:selectOneMenu value="#{reportRegisterManagedBean.starter}">
    <f:selectItems value="#{reportRegisterManagedBean.startersSelectItems}" />
</p:selectOneMenu>

来源：https://stackoverflow.com/questions/15608843/fselectitems-itemdescription-does-not-work