public function order(){
    $gid = input('gid');
    //接收当前用户的积分
    $count = input('count');
    //查询商品
    $goods = Db::table('goods')->where(['gid'=>$gid])->find();
    //判断用户积分是否大于商品兑换积分
    if ($count>$goods['gcount']){
        //如果已经提交订单 则不能再提交
        if ($goods['state'] == '审核中'){
            $this->error('您已提交订单，请耐心等待管理员审核','/show');
        }else if ($goods['state'] == '已兑换'){
            $this->error('您已兑换成功,请勿重复兑换','/show');
        }else{
            return view('order/order',['goods'=>$goods]);
        }
    }else{
        $this->error('积分不足，无法兑换','/show');
    }
}
public function orderDo(){
    //接收session中的用户id
    $data['uid'] = session('id');
    //接收商品id
    $data['gid'] = request()->param('gid');
    $data['oname'] = request()->param('oname');
    $data['ohome'] = request()->param('ohome');
    $data['ophone'] = request()->param('ophone');
    $data['odesct'] = request()->param('odesct');
    //生成随机订单号 用户id+当前时间+随机数
    $data['numb'] = session('id').time().rand(0000,9999);
    //向订单表里添加数据
    $orderIns = Db::table('orders')->insert($data);
    //如果数据添加成功
    if ($orderIns){
        //则修改 商品表里的用户id 和 审核状态
        $goodsIns = Db::table('goods')->where(['gid'=>$data['gid']])->update(['uid'=>$data['uid'],'state'=>'审核中']);
        if ($goodsIns){
            $this->success('提交成功，请耐心等待','/show');
        }else{
            $this->error('提交失败','/show');
        }
    }
}