I'm using Primefaces in a JSF 2 application. I have a <p:dataTable>
, and instead of selecting rows, I want the user to be able to directly execute various actions on individual rows. For that, I have several <p:commandLink>
s in the last column.
My problem: how can I pass a row ID to the action started by the command link so that I know which row to act on? I tried using an <f:attribute>
:
<p:dataTable value="#{bean.items}" var="item">
...
<p:column>
<p:commandLink actionListener="#{bean.insert}" value="insert">
<f:attribute name="id" value="#{item.id}" />
</p:commandLink>
</p:column>
</p:dataTable>
But it always yields 0 - apparently the row variable f
is not available when the attribute is rendered (it works when I use a fixed value).
Anyone has an alternative solution?
This question is related to
jsf
jsf-2
datatable
parameter-passing
commandlink
ui-select2
In JSF 1.2 this was done by <f:setPropertyActionListener>
(within the command component). In JSF 2.0 (EL 2.2 to be precise, thanks to BalusC) it's possible to do it like this: action="${filterList.insert(f.id)}
Thanks to this site by Mkyong, the only solution that actually worked for us to pass a parameter was this
<h:commandLink action="#{user.editAction}">
<f:param name="myId" value="#{param.id}" />
</h:commandLink>
with
public String editAction() {
Map<String,String> params =
FacesContext.getExternalContext().getRequestParameterMap();
String idString = params.get("myId");
long id = Long.parseLong(idString);
...
}
Technically, that you cannot pass to the method itself directly, but to the JSF request parameter map
.
In my view page:
<p:dataTable ...>
<p:column>
<p:commandLink actionListener="#{inquirySOController.viewDetail}"
process="@this" update=":mainform:dialog_content"
oncomplete="dlg2.show()">
<h:graphicImage library="images" name="view.png"/>
<f:param name="trxNo" value="#{item.map['trxNo']}"/>
</p:commandLink>
</p:column>
</p:dataTable>
backing bean
public void viewDetail(ActionEvent e) {
String trxNo = getFacesContext().getRequestParameterMap().get("trxNo");
for (DTO item : list) {
if (item.get("trxNo").toString().equals(trxNo)) {
System.out.println(trxNo);
setSelectedItem(item);
break;
}
}
}
Source: Stackoverflow.com