Question

Here is my Problem:

• Backing bean is @SessionScoped
• I have a p:dataTable with selectionMode set to single and selection #{bean.selectedCar}
• first column in the table is a commandLink that updates a dialog :detailDialog, oncomplete shows the dialog and has an actionListener that hast to clear some property in the bean
• f:setPropertyListener has a value #{item} and target #{bean.selectedCar}

I want that the user is able to click the link and the dialog will display the information for the object on the row, but it works only if a row in the dataTable was selected first. If no row was selected and the user clicks on the commandLink NULL is passed to the bean.selectedCar and the page hangs.

As a workaround I would like at least to be able to preselect the first row in the dataTable and hopefully this will do the trick.

Answer 1

You can re-use your f:setPropertyListener in your command link:

<p:commandLink value="show" 
               actionListener="#{bean.doSomething}" 
               oncomplete="dialog.show()">
    <f:setPropertyListener value="#{item}" target="#{bean.selectedCar}"/>
</p:commandLink>

alternatively (since we are iterating through a dataTable) you can pass the current #{item} object to your <p:commandLink.../>:

<p:commandLink value="Show" 
               action="#{bean.selectThisCar(item)}" 
               oncomplete="dialog.show()"/>