Текст из записей на стене пользователя не участвует в поиске

ALTER TABLE `cms_wall_entries` ADD FULLTEXT( `content`);
 

<?php
 
class onWallFulltextSearch extends cmsAction {
 
    public function run($search_controller) {
 
        $name = 'wall';
        $sources[$name] = 'Запись на стене';
        $match_fields[$name] = array('content');
        $select_fields[$name] = array('id', 'content', 'user_id', 'date_pub');
        $filters[$name] = array();
        $table_names[$name] = 'wall_entries';
 
        return [
            'name'          => $name,
            'sources'       => $sources,
            'table_names'   => $table_names,
            'match_fields'  => $match_fields,
            'select_fields' => $select_fields,
            'filters'       => $filters,
            'item_callback' => function ($item, $model, $sources_name, $match_fields, $select_fields)  {
 
             $fields = [];
 
                foreach ($match_fields as $match_field) {
                    if ($match_field === 'title') {
                        continue;
                    }
                    $fields[$match_field] = $item[$match_field];
                }
 
                return array_merge($item, [
                    'url'      => href_to('users', $item['user_id']).'?wid='.$item['id'],
                    'title'    => 'Запись со стены',
                    'fields'   => $fields,
                    'date_pub' => $item['date_pub'],
                    'image'    => ''
                ]);
            }
        ];
 
    }
 
}