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Question

Submit Listener Method in the BackBean is not getting invoked.

Answer 1

A:

When a form is not being submitted, sometimes it may happen from a mistaken usage of JSF component.

I see that you are using

<h:selectOneMenu id="slaView" value="#{LoginForm.slaView}" required="true">
            <f:selectItems value="#{LoginForm.viewList}" />
        </h:selectOneMenu>

which comes from:

viewList=ddC.getViewList();

and the selected item goes into a String value.

can you please write the code of getViewList ?

If the items are declared of int,String - than the problem is that slaView should be of type int.

Odelya 2010-07-28 08:56:52

Sure....I have made a seperate class for all the drop downs. I am invoking the methods to fetch the drop down list :List<SelectItem> viewList=new ArrayList<SelectItem>();public List<SelectItem> getViewList() { viewList.clear(); viewList.add(new SelectItem(0,"Select")); viewList.add(new SelectItem(1,"Table")); viewList.add(new SelectItem(2,"Graph")); return viewList;}If you require I can paste the entire code of that class. thanks for your reply.

Debarshi DasGupta 2010-07-28 09:15:30

@Debarshi - you can see my answer in your code. You add (new SelectItem(2,"Graph")) where the first item is int (2) and the second item is String ("Graph"). Which means that also slaView has to be of type int and not of type String.As well, the rest of value of h:selectOnMenu must be of type int.

Odelya 2010-07-28 09:32:57

Ok thanks for your suggestion I am trying the same. I will update you once it is done.

Debarshi DasGupta 2010-07-28 09:41:11

@Odelya u are gr8.....thankzzzzz^billions my problem is resolved......There is another problem small problem my page is getting cached....do u have a solution?

Debarshi DasGupta 2010-07-28 13:11:51

@Debarshi for the other problem please post a new question. Like this other users may be able to help.

Odelya 2010-07-28 13:17:49

@Odelya as you wish Mam.

Debarshi DasGupta 2010-07-28 13:27:26

Answer 2

A:

You're calling FacesContext.getCurrentInstance().renderResponse(); inside a valueChangeListener method whenever a dropdown value changes. This will cause the remaining phases of the JSF lifecycle being skipped until the render response phase. Since the valueChangeListener method is invoked during validations phase, the update model values and invoke action phases are skipped. And guess what, the submit button is to be invoked during invoke action phase, but this is been skipped!

Anyway, creating dynamic dependent dropdown menus wherein the data is fully to be retrieved from the server side without any help of advanced JavaScript and Ajax is a real pain. You've to take a lot of things into account with regard to skipping validation of other fields and retaining submitted values of other fields. So also in JSF. Long story short, here's an article which describes how to do it properly: Populate child menu's.

BalusC 2010-07-28 11:43:34

Dear Balus ,I am big fan of yours. thanks for your suggestions and time. See the problem is if I am removing this statement FacesContext.getCurrentInstance().renderResponse(); my values are getting resset on selecting the select one menu. There is a big problem of page caching with jsf , do you have a solution for that ? what I am planning is to manually reset the drop down using js. Will it be fyn?

Debarshi DasGupta 2010-07-28 13:23:25

You need this line, but in combination with `immediate="true"` and **component binding**. Do this only for dropdowns which are to be used to update another dropdown on change. Also see the linked article for a working code example.

BalusC 2010-07-28 13:53:30

ok thanks a loooooot.

Debarshi DasGupta 2010-07-28 14:04:57

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Submit Listener Method in the BackBean is not getting invoked.

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