广告小程序后端开发（17.优惠券系统：获取未兑付未过期的我的奖品，获取优惠券参数和兑付优惠券）

1.获取未兑付未过期的我的奖品

1.在apps/user_operation/views.py中新建GeMyPrize：

class GeMyPrize(APIView):
    """
    获取我的奖品
    """
    renderer_classes = [JSONRenderer]  # 渲染器

    def get(self,request):
        token = request.GET.get('token')
        user = UserProfile.objects.filter(token=token).first()
        if user:
            p_list=GetPrize.objects.filter(user=user,end_time__gt=datetime.now(),status='0').order_by('-add_time')
            p=GetPrizeModelSerializer(p_list,many=True)
            return Response(p.data)
        else:
            return HttpResponse('参数不足')

2.在apps/user_operation/urls.py内配置路由：

from django.urls import path
from .views import GetMessage,ReadMessage,DelMessage,BuyUseJiFen,GeMyPrize

urlpatterns = [
    path('getmessage/',GetMessage.as_view()),
    path('readmessage/',ReadMessage.as_view()),
    path('delmessage/',DelMessage.as_view()),
    path('buyusejifen/',BuyUseJiFen.as_view()),
    path('getmyprize/',GeMyPrize.as_view()),
]

2.获取优惠券参数和兑付优惠券

1.简单原理：

扫码操作于普通小程序端，而要直接操作广告小程序的数据库必须要在广告小程序端，所以需要用两个视图类进行对接配合，其中两个视图类的get负责获取优惠券参数的功能实现，post则负责兑付优惠券的功能实现。

2.在apps/user_operation/models.py中新建属于普通小程序段的兑付表PayPrize:

class PayPrize(models.Model):
    """奖品兑付表小程序端"""
    admin_user=models.CharField(max_length=20,verbose_name='职工微信名',null=True,blank=True)
    user = models.CharField(max_length=20, verbose_name='微信用户名', null=True, blank=True)
    prize_title = models.CharField(max_length=20, verbose_name='奖券名', null=True, blank=True)
    add_time = models.DateTimeField(default=datetime.now, verbose_name="添加时间")

    class Meta:
        verbose_name = "小程序端兑付表"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.prize_title

执行数据更新命令：

python manage.py makemigrations
python manage.py migrate

3.在apps/user_operation/adminx.py内注册：

class PayPrizeAdmin(object):
    list_display = ["admin_user","user","prize_title","add_time"]
    list_filter = ["admin_user","user","prize_title","add_time"]

xadmin.site.register(PayPrize, PayPrizeAdmin)

4.在apps/user_operation/views.py中新建类CheckingPirze，EditGetPrize：

class CheckingPirze(APIView):
    """扫码访问小程序验证"""
    renderer_classes = [JSONRenderer]  # 渲染器

    def get(self,request):
        token = request.GET.get('token')
        # 扫码者
        admin_user = UserProfile.objects.filter(token=token).first()
        openid = request.GET.get('oid')
        user = UserProfile.objects.filter(open_id=openid).first()
        prizeid=request.GET.get('pid')
        if user and prizeid and admin_user.is_staff:
            # 扫码者必须是员工才可以往下走
            res = urllib.request.urlopen(PRIZEURL+"?openid="+openid+"&prizeid="+prizeid)
            # print('1',res)
            # print('查询结果',type(res.read().decode("utf-8")))
            obj = json.loads(res.read().decode("utf-8"))
            # print('obj',obj)
            re_user=UserProfileModelSerializer(user)
            return Response(data=({'getprize':obj,'user':re_user.data}))
        else:
            return HttpResponse('参数不足')

    def post(self,request):
        token = request.POST.get('token')
        # 扫码者
        admin_user = UserProfile.objects.filter(token=token).first()
        getprizeid=request.POST.get('getprizeid')
        if getprizeid and admin_user.is_staff:
            # 扫码者必须是员工才可以往下走
            data_dict = {"gid":getprizeid}
            data_string = urllib.parse.urlencode(data_dict)
            last_data = bytes(data_string, encoding='utf-8')
            res = urllib.request.urlopen(PRIZEURL,data=last_data)
            st=res.read().decode("utf-8")
            dict_st=eval(st)
            # print('res:',dict_st)
            # if res.read().decode("utf-8")=="200":
            # print('code:',type(dict_st["code"]))
            if dict_st["code"]=='200':
                # print('username',dict_st["user"])
                # print('title', dict_st["title"])
                pay_prize=PayPrize()
                pay_prize.admin_user=admin_user.nickName
                pay_prize.user=dict_st["user"]
                pay_prize.prize_title=dict_st["title"]
                pay_prize.save()
            return HttpResponse(dict_st["code"])
        else:
            return HttpResponse('参数不足')


class EditGetPrize(APIView):
    """get查询，post修改"""
    renderer_classes = [JSONRenderer]  # 渲染器

    def get(self, request):
        openid = request.GET.get('openid')
        user = UserProfile.objects.filter(open_id=openid).first()
        prizeid = request.GET.get('prizeid')
        if user and prizeid:
            prizeid=int(prizeid)
            prize = Prize.objects.filter(id=prizeid).first()
            p=GetPrize.objects.filter(user=user,prize=prize).first()
            re_p=GetPrizeModelSerializer(p)
            if p:
                return Response(re_p.data)
            else:
                #查无领取记录
                return HttpResponse('404')
        else:
            return HttpResponse('参数不足')

    def post(self, request):
        get_pid=request.POST.get('gid')
        if get_pid:
            get_pid=int(get_pid)
            # print('getid',get_pid)
            pr=GetPrize.objects.filter(id=get_pid,end_time__gt=datetime.now()).first()
            if pr:
                if pr.status=='1':
                    # 已经兑付过的了
                    re={'code': '405', 'msg': '此奖品已经兑付过'}
                    return Response(data=re)
                else:
                    pr.status = '1'
                    pr.save()
                    user = pr.user
                    title = pr.title
                    msg = Message()
                    msg.user = user
                    msg.content = "您成功使用了积分奖券：" + title
                    msg.save()
                    # print('新消息',msg.content)
                    re = {'code': '200', 'msg': '兑奖成功','title':title,'user':user.nickName}
                    return Response(data=re)
            else:
                # 奖品已过期
                re = {'code': '404', 'msg': '此奖品不存在或已过期'}
                return Response(data=re)
        else:
            re = {'code': '403', 'msg': '参数不足'}
            return Response(data=re)

5.在apps/user_operation/urls.py内配置路由：

from django.urls import path
from .views import GetMessage,ReadMessage,DelMessage,BuyUseJiFen,CheckingPirze,EditGetPrize,GeMyPrize

urlpatterns = [
    path('getmessage/',GetMessage.as_view()),
    path('readmessage/',ReadMessage.as_view()),
    path('delmessage/',DelMessage.as_view()),
    path('buyusejifen/',BuyUseJiFen.as_view()),
    path('checkingprize/',CheckingPirze.as_view()),
    path('editgetprize/',EditGetPrize.as_view()),
    path('getmyprize/',GeMyPrize.as_view()),
]

 6.在settings.py中配置：

# 广告平台兑奖url
PRIZEURL='http://127.0.0.1:8000/useroperation/editgetprize/'