Primefaces valueChangeListener or p ajax listener not firing for p selectOneMenu

Question

I am using Primefaces 3 4 2   I have the following in my JSF page   lt p selectOneMenu id  emp  value    mymb emp employeeName            valueChangeListener    mymb handleChange            required  true          style  width  150px   gt       lt f selectItem noSelectionOption  true               itemLabel  Please  Select   gt       lt f selectItems value    mymb employeeList   var  emp              itemLabel    emp employeeName               itemValue    emp employeeNumber    gt       lt p ajax update  sublist   gt   lt  p selectOneMenu gt    and in ManagedBean  public void handleChange ValueChangeEvent event         System out println  here   event getNewValue         The problem is valueChangeListener is not firing  i e  handleChange method is not getting invoked  I tried with the following  but it is not working either    lt p ajax update  sublist   listener    mymb handleChange     gt      Separate JSF page    lt ui composition template   templates layout xhtml      xmlns  http   www w3 org 1999 xhtml      xmlns f  http   java sun com jsf core      xmlns h  http   java sun com jsf html      xmlns ui  http   java sun com jsf facelets      xmlns p  http   primefaces org ui  gt       lt ui define name  content  gt           lt h head gt           lt  h head gt           lt h body gt               lt h form id  form  gt                                         lt p panelGrid columns  6  gt                       lt h outputLabel value  Employees  for  employees    gt                       lt p selectOneMenu id  employees                              value    mymb employeesList                                required  true  gt                           lt f selectItems value    mymb employeesList   var  emp                                  itemLabel    emp employeeName     gt                           lt p ajax listener    mymb handleChange       gt                         lt  p selectOneMenu gt                                     lt  p panelGrid gt               lt  h form gt           lt  h body gt       lt  ui define gt   lt  ui composition gt

User · Answer

Another solution is to mix valueChangeListener, ajax and process:

<p:selectManyCheckbox id="employees" value="#{employees}" columns="1" layout="grid" valueChangeListener="#{mybean.fireSelection}"   >
    <f:selectItems var="employee" value="#{employeesSI}" />
    <p:ajax event="valueChange" immediate="true" process="@this"/>
</p:selectManyCheckbox>

Method in mybean is just :

public void fireSelection(ValueChangeEvent event) {
    log.debug("New: "+event.getNewValue()+", Old: "+event.getOldValue());
}

Like this, valueChangeEvent is very light !

PS: Works fine with PrimeFaces 5.0

User · Answer

If you want to use valueChangeListener  you need to submit the form every time a new option is chosen  Something like this    lt p selectOneMenu value    mymb employee   onchange  submit                     valueChangeListener    mymb handleChange    gt       lt f selectItems value    mymb employeesList   var  emp                     itemLabel    emp employeeName   itemValue    emp employeeID     gt   lt  p selectOneMenu gt   public void handleChange ValueChangeEvent event         System out println  New value      event getNewValue         Or else  if you want to use  lt p ajax gt   it should look like this    lt p selectOneMenu value    mymb employee    gt       lt p ajax listener    mymb handleChange     gt       lt f selectItems value    mymb employeesList   var  emp                     itemLabel    emp employeeName   itemValue    emp employeeID     gt   lt  p selectOneMenu gt   private String employeeID   public void handleChange          System out println  New value      employee       One thing to note is that in your example code  I saw that the value attribute of your  lt p selectOneMenu gt  is   mymb employeesList  which is the same as the value of  lt f selectItems gt   The value of your  lt p selectOneMenu gt  should be similar to my examples above which point to a single employee  not a list of employees

User · Answer

The valueChangeListener is only necessary  if you are interested in both the old and the new value   If you are only interested in the new value  the use of  lt p ajax gt  or  lt f ajax gt  is the better choice   There are several possible reasons  why the ajax call won t work  First you should change the method signature of the handler method  drop the parameter  Then you can access your managed bean variable directly   public void handleChange        System out println  here    getEmp   getEmployeeName         At the time  the listener is called  the new value is already set   Note that I implicitly assume that the el expression mymb emp employeeName is correctly backed by the corresponding getter setter methods

User · Answer

Try using p ajax with event attribute

User · Answer

this works for me     It can be used inside the dialog  but the dialog can  t be inside any componet such as panels  accordion  etc

User · Answer

lt p ajax listener    my handleChange   update  id of component that need to be rerender after change  process   this    gt     import javax faces component UIOutput  import javax faces event AjaxBehaviorEvent   public void handleChange AjaxBehaviorEvent vce       String name   String    UIOutput  vce getSource    getValue

User · Answer

My problem were that we were using spring securyty  and the previous page doesn t call the page using faces-redirect true  then the page show a java warning  and the control doesn t fire the change event    Solution  The previous page must call the page using  faces-redirect true

User · Answer

All can be defined as in f ajax attiributes   i e        lt p selectOneMenu id  employees  value    mymb employeesList   required  true  gt            lt f selectItems value    mymb employeesList   var  emp  itemLabel    emp employeeName     gt            lt f ajax event  valueChange  listener    mymb handleChange   execute   this  render   all    gt       lt  p selectOneMenu gt    event  it can be normal DOM Events like click  or valueChange  execute  This is a space separated list of client ids of components that will participate in the  execute  portion of the Request Processing Lifecycle   render  The clientIds of components that will participate in the  render  portion of the Request Processing Lifecycle  After action done  you can define which components should be refresh  Id  IdList or these keywords can be added   this   form   all   none   You can reache the whole attribute list by following link  http   docs oracle com javaee 6 javaserverfaces 2 1 docs vdldocs facelets f ajax html

[jsf] Primefaces valueChangeListener or <p:ajax listener not firing for p:selectOneMenu

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