Determine if we should provide sorting based upon $_GET inputs
bool
Overrides StylePluginBase::build_sort
function build_sort() {
$order = drupal_container()
->get('request')->query
->get('order');
if (!isset($order) && ($this->options['default'] == -1 || empty($this->view->field[$this->options['default']]))) {
return TRUE;
}
// If a sort we don't know anything about gets through, exit gracefully.
if (isset($order) && empty($this->view->field[$order])) {
return TRUE;
}
// Let the builder know whether or not we're overriding the default sorts.
return empty($this->options['override']);
}