function pos_id($field, $value, $fieldinfo) {
        $position =  json_decode(Yii::$app->cache->get(CacheId::positionCacheId()),true);
        if(empty($position)) return '';
        $array = array();
        if(is_array($position))foreach($position as $_key=>$_value) {
            if($_value['content_model_id'] && (($_value['content_model_id'] !=  $this->model_id) || ($_value['cat_id'] && strpos(','.$this->categorys[$this->cat_id]['arr_parent_ids'].',',','.$_value['cat_id'].',')===false))) continue;
            $array[$_key] = $_value['name'];
        }
        $pos_ids = array();
        if(Yii::$app->controller->action->id=='edit') {
            $data_list = PositionData::find()->where("data_id=".$this->id." and content_model_id = ".$this->model_id."")->all();
            foreach($data_list as $key=>$value)
            {
                $pos_ids[]=$value['position_id'];
            }
            $pos_ids = implode(',',$pos_ids);
        } else
        {
            $pos_ids='';
            if(isset($fieldinfo['default_value']))$pos_ids = $fieldinfo['default_value'];
        }
        $string =  '<div class="mb-3 row "  >';
        $string .= '<label class="col-md-2 col-form-label">'.$fieldinfo['name'].'</label>';
        $string .= FormElements::checkbox($array,$pos_ids,"name='info[$field][]'   class='form-check-input' ");
        $string  .= '</div>';
        return $string;
    }