Form alter强制暴露视图过滤器为fllow过滤器选项

Posted 2021-02-27

callback in a form alter to enforce an exposed filter to use only the options set in filter. Works for selectlists only.

/**
 * Form alter hook Callbacks and helpers
 */
function _mymodule_formalter_exported_filter(&$form) {
  $filter_id = 'workflow_node.sid'; //set this to the id of the filter. use print_r($form['view'][#value']->filter) to find the ID
 
  foreach($form['view']['#value']->filter as $filter) {
    if ($filter['field'] == $filter_id) {
      $only_these = $filter['value'];
      break;
    }
  } 
 
  foreach ($form['filter0']['#options'] as $key => $option) {
    if (in_array($key, $only_these)) {
     $options[$key] = $option;
    }
  }
  $form['filter0']['#options'] = $options;
 
  if(is_array($form['filter0']['#default_value'])) {
    $form['filter0']['#default_value'] = 40; //or any other value.
  }
}