php remove_empty_filters_views_query.php

Posted 2021-05-05

/**
 * Implements hook_views_query_alter().
 */
function mymodule_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
  if ('wm_users' == $view->id() && 'page_1' == $view->current_display) {
    // We don't want to filter the values when the filter value is empty.
    $filters = [ // Filters to unset from query when they are empty
      'id_1',
      'id',
    ];

    $fields = [];

    foreach ($filters as $filter_name) {
      if (isset($view->filter[$filter_name])) {
        $fields[] = $view->filter[$filter_name]->relationship . '.' . $view->filter[$filter_name]->field;
      }
    }

    if ($fields) {
      foreach ($query->where as &$where_group) {
        foreach ($where_group['conditions'] as $key => $condition) {
          $match = array_search($condition['field'], $fields);

          if (FALSE !== $match) {
            if (empty($condition['value'])) {
              unset($where_group['conditions'][$key]);
            }

            unset($fields[$match]);

            if (!$fields) {
              break 2;
            }
          }
        }
      }
    }
  }
}