sorting in p:datatable behave unusual - jsf-2

Question

I am using sorting in p:datatable, and last column is edit .
its working fine till sorting is pressed. as soon as I do sorting it behave unusual.
On editing it giving wrong object.
belwo is my datatable.
<h:form>
<h:inputHidden value="#{countryBean.initList}" />
<p:dataTable id="existingCountry1" var="countryLang" value="#{countryBean.myexistingCountryList}" style="width: 100%" styleClass="role_detail_section"
rowStyleClass="activity_white, activity_blue" cellspacing="0" cellpadding="0" border="0" rows="6" paginator="true">
<p:column width="30%" headerText="Country " sortBy="countryName">
<h:outputLabel value="${countryLang.countryName}" />
</p:column>
<p:column width="30%" headerText="Country Code " >
<h:outputLabel value="${countryLang.countryCode}" />
</p:column>
<p:column headerText="Edit" >
<p:commandLink id="editCommandLinkId"
action="#{countryBean.editCountryByCountryCode(countryLang.countryCode,true)}" title="Edit" styleClass="edit_icon" onstart="statusDialog.show();" onsuccess="statusDialog.hide();"/>
</p:column>
</p:dataTable>
suppose I edited for US, then it will show data for AU like that.
for sorting I am using belwo technique
private ArrayList<Country> myexistingCountryList;
public String getInitList() {
myexistingCountryList= getExistingCountryList();
return null;
}
public ArrayList<Country> getExistingCountryList() {
try {
existingCountryList = new ArrayList<Country>();
existingCountryList.addAll(getCountryService().getExistingCountry());
} catch (ServiceException e) {
e.printStackTrace();
errorLogger.error("Error while getExistingCountryList in service layer", e);
}

Answer 1

There are to many mistakes in your code.
Instead of $ use #
Instead of sortBy="countryName" write sortBy="#{countryLang.countryName}"
So basicly
change this
<p:column width="30%" headerText="Country " sortBy="countryName">
<h:outputLabel value="${countryLang.countryName}" />
</p:column>
to this
<p:column width="30%" headerText="Country " sortBy="#{countryLang.countryName}">
<h:outputLabel value="#{countryLang.countryName}" />
</p:column>