i have multiple dropdown lists using primefaces 5.0. select option in first drop down list (in case country) should grab cities in country , populate city drop down list. however, have code populate cities drop down list database using country method never called.
my region.xhtml:
<h:form> <p:tab title="region selection" rendered="true"> <p:panel header="region information"> <h:panelgrid columns="2" columnclasses="label, value"> <h:outputtext value="country" /> <p:selectonemenu id="country" value="#{rosterbean.selectedcountry}"> <p:ajax listener="#{rosterbean.oncountrychange()}" update="state" /> <f:selectitem itemlabel="select country" itemvalue="" noselectionoption="true" /> <f:selectitems value="#{rosterbean.countries}" /> </p:selectonemenu> <h:outputtext value="state/ province" /> <p:selectonemenu id="state" value="#{rosterbean.selectedstate}"> <p:ajax listener="#{rosterbean.onstatechange}" /> <f:selectitem itemlabel="select state" itemvalue="" noselectionoption="true" /> <f:selectitems value="#{rosterbean.states}" /> </p:selectonemenu> <h:outputtext value="city" /> <p:selectonemenu id="city" filter="true" filtermatchmode="contains" > <f:selectitem itemlabel="johannesburg" itemvalue="0" noselectionoption="true" /> <f:selectitem itemlabel="pretoria" itemvalue="1" noselectionoption="true" /> </p:selectonemenu> </h:panelgrid> </p:panel> </p:tab> </h:form> my bean:
@viewscoped @managedbean public class rosterbean implements serializable { public void oncountrychange() { system.out.println("updating state"); } } i have got getters , setters, system.out never called. irrespective if going call right cities in country never gets there.
your input elements , p:ajax need nested within h:form, otherwise no data submitted on post. actionlisteners require access submitted value (either through method parameters or actionevent), appears listeners not called if submitted value not available.
hint: can check browser's developer tools see submitted.
see also
- jsf: execute values of multiple forms
- how execute <h:form> using <f:ajax>?
- jsf - actionlistener tag calls method doesn't take actionevent parameter
you seem still having trouble, here complete example, modified own:
<?xml version='1.0' encoding='utf-8' ?> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:p="http://primefaces.org/ui" xmlns:f="http://java.sun.com/jsf/core"> <h:head> </h:head> <h:body> <h:form> <p:panel header="region information"> <h:panelgrid columns="2" columnclasses="label, value"> <h:outputtext value="country" /> <p:selectonemenu id="country" value="#{rosterbean.selectedcountry}" > <p:ajax listener="#{rosterbean.oncountrychange()}" update="state" /> <f:selectitem itemlabel="select country" itemvalue="" noselectionoption="true" /> <f:selectitem itemlabel="country 1" itemvalue="1" /> </p:selectonemenu> <h:outputtext value="state/ province" /> <p:selectonemenu id="state" value="#{rosterbean.selectedstate}" > <p:ajax listener="#{rosterbean.oncountrychange}" /> <f:selectitem itemlabel="select state" itemvalue="" noselectionoption="true" /> <f:selectitem itemlabel="state1 1" itemvalue="1" /> </p:selectonemenu> </h:panelgrid> </p:panel> </h:form> <p:commandbutton value="next"/> </h:body> </html> (note deleted class attribute commandbutton. class not valid attribute on commandbutton.)
rosterbean.java
import javax.faces.bean.managedbean; import javax.faces.bean.viewscoped; @managedbean @viewscoped public class rosterbean { public string selectedcountry; public string selectedstate; public string getselectedcountry() { return selectedcountry; } public void setselectedcountry(string selectedcountry) { this.selectedcountry = selectedcountry; } public string getselectedstate() { return selectedstate; } public void setselectedstate(string selectedstate) { this.selectedstate = selectedstate; } public void oncountrychange() { system.out.println("updating state"); } } 
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