Thank you for the quick response. Calling renderResponse() helped in that I
no longer see the validation message for the required inputText. However, I
still get a validation message when I change the first selection back to the
unselected state, saying that the selection is required. Is there any way I
can skip validation when this selection is changed and still get validation
when the form is submitted by some other means?
Eric
Stephen Friedrich-4 wrote:
>
> If I understand JSF correctly, immediate does not skip validation, but
> only
> moves the processing of events from the "immediate component" to an
> earlier
> phase in the life cycle.
>
> If you don't do anything special, then after the value change event is
> processed, the rest of the lifecycle, including any validations is
> performed.
>
> To circumvent that and go directly from the value changed event to the
> rendered
> response use this inside your selectionChange() method:
> FacesContext.getCurrentInstance().renderResponse();
>
> Have not tried your example, but I think it should work.
>
> Eric Fikus wrote:
>> Hello,
>>
>> I have two tr:selectOneChoice components, where the list of choices in
>> the
>> second depends on the selection made in the first. The first selection
>> is
>> required. I have other required fields in the same form. So I have
>> something that looks like this:
>>
>> <tr:messages />
>>
>> <tr:panelHorizontalLayout>
>>
>> <tr:inputText label="Input:"
>> required="true"
>> value="#{testBean.input}" />
>>
>> <tr:selectOneChoice label="Select one:"
>> required="true"
>> requiredMessageDetail="You must select one"
>> unselectedLabel="Select one..."
>> value="#{testBean.firstSelection}"
>> readOnly="false"
>> valueChangeListener="#{testBean.selectionChange}"
>> autoSubmit="true"
>> id="firstSelection"
>> immediate="true">
>> <f:selectItems value="#{testBean.firstList}" />
>> </tr:selectOneChoice>
>>
>> <tr:selectOneChoice label="Select:"
>> unselectedLabel="Select another one..."
>> value="#{testBean.secondSelection}"
>> rendered="true"
>> partialTriggers="firstSelection">
>> <f:selectItems value="#{testBean.secondList}" />
>> </tr:selectOneChoice>
>>
>> </tr:panelHorizontalLayout>
>>
>> I've included the Java code at the end of the message. It is not very
>> interesting and seems to work, ie, the choices in the second list change
>> each time the selection in the first changes.
>>
>> The problem is that every time the first selection changes, a message is
>> displayed indicating that the inputText is required ("Input:- Value
>> Required"). If the first selection is changed back to the unselected
>> label,
>> a message is displayed to indicate that the selection is required.
>> Obviously I have the first selection set to immediate because I don't
>> want
>> validation to occur when this changes, I only want the second list to be
>> updated. If I do not use immediate="true", messages are not displayed in
>> the tr:messages component but messages are displayed next to the required
>> inputs that are missing. It works the way I want it to if I used
>> immediate="true" and do not have a messages component.
>>
>> Questions:
>> - Why is validation performed on an immediate form submission? It seems
>> to
>> be skipping one stage of validation (and so not displaying the message
>> next
>> to the required component) but still validating and displaying a message.
>> - How can I get the behavior I want and still have a tr:messages
>> component
>> on the page?
>>
>> Regards,
>> Eric Fikus
>>
>>
>> Java code:
>>
>> // imports not shown
>> public class TestBean
>> {
>> private String input;
>> private String firstSelection;
>> private String secondSelection;
>> private List<SelectItem> secondList;
>>
>> public List<SelectItem> getFirstList()
>> {
>> return Arrays.asList(new SelectItem("a"), new SelectItem("b"));
>> }
>>
>> public void selectionChange(ValueChangeEvent event)
>> {
>> String value = (String) event.getNewValue();
>> if (value.equals("a"))
>> {
>> secondList = Arrays.asList(new SelectItem("apple"));
>> }
>> else if (value.equals("b"))
>> {
>> secondList = Arrays.asList(new SelectItem("blue"));
>> }
>> }
>>
>> // getters and setters for all fields not shown
>> }
>
>
>
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