function getAppointRule(store_id,key=''){
    if(key){list= \think\Db::name('course_appoint_rule')
            ->where('store_id', store_id)
            ->value(key);
    }else{
        list=\think\Db::name('course_appoint_rule')
            ->where('store_id',store_id)
            ->field('id,store_id',true)->find();
    }
    return $list;

}