select All checkbox in JSF without using Javascript

Question

I am trying to select/unselect all checkboxes in the datatable using a single checkbox. As I am trying to set it on the server, I am unable to do so. I have looked around fo

Answer 1

It's because the ValueChangeEvent occurs before the update model phase, so the value you change gets overwritten.
Do this in the public void selectAllComponents(ValueChangeEvent event)

if (event.getPhase() != PhaseId.INVOKE_APPLICATION) {
    event.setPhase(PhaseId.INVOKE_APPLICATON);
    event.queue();
 } else {
    //do your stuff here
 }

Answer 2

Or just before your code add next line code in your original method

selectAll = (Boolean) event.getNewValue();