Advertising applet back-end development (16 coupon system: the principle of a flow chart, prizes experimental data, generate two-dimensional code)

Business need: coupons made many other small programs within a small advertising program.

1. Principle flowchart

 

2. prize (coupon) experimental data

Table 1. Class modify Prize apps / ad / models.py in

class Prize(models.Model):
    """奖品"""
    title = models.CharField(max_length=15, null=True, blank=True, verbose_name='标题', help_text='最多15字')
    url=models.CharField(max_length=200, null=True, blank=True, verbose_name='小程序url')
    area = models.ForeignKey(Area, null=True, blank=True, verbose_name="地区", on_delete=models.CASCADE)
    get_num=models.IntegerField(default=0,verbose_name='被领取数')
    . price = models.IntegerField (default = 0, verbose_name = ' Required points ' ) 
    all_num = models.IntegerField (default = 0, verbose_name = ' number issued ' ) 
    is_out = models.BooleanField (default = False, verbose_name = ' has been sold ' ) 
    desc = models.TextField (default = ' ' , 400 = MAX_LENGTH, the verbose_name = ' description ' , help_text = ' up to 400 characters ' ) 
    Usage = models.TextField (default = '' , = 200 is MAX_LENGTH, the verbose_name = ' use ', Help_text =' Up to 200 characters ' ) 
    Image = models.ImageField (MAX_LENGTH = 200, default = ' ' , the upload_to = ' prizeimg / ' , the verbose_name = ' prize image ' ) 
    END_TIME = models.DateTimeField (default = DateTime.Now, the verbose_name = ' expiration time ' ) 
    ADD_TIME = models.DateTimeField (default = DateTime.Now, the verbose_name = ' addition time ' ) 

    class Meta -: 
        the verbose_name = " prize " 
        verbose_name_plural = the verbose_name

    def __str__(self):
        return self.title

    def image_url(self):
        return mark_safe('<img src="/media/{0}" class="field_img">'.format(self.image))

    image_url.short_description = '奖品图片'

Perform data update command:

python manage.py makemigrations
python manage.py migrate

2. Modify apps / ad / adminx.py in PrizeAdmin

class PrizeAdmin(object):
    list_display = ["title", "get_num","is_out","url","price","area", "all_num", "desc","usage","end_time","image_url","add_time"]
    list_filter = ["title", "get_num","is_out","url", "price", "area","all_num", "desc","usage","end_time","add_time"]
    search_fields = ["title", "get_num", "price", "all_num", "desc","usage"]

3. By xadmin background, direct experiments to fill in some of the prize table Prize

3. Generate two-dimensional code picture

1. Download from the Internet 14 (this number can be customized), and then put gg / static / 2 under the new directory, which generates a background image for the two-dimensional code of FIG:

 

2. Install myqr

pip install myqr

3. Modify tables GetPrize class apps / user_operation / models.py of:

class GetPrize(models.Model):
    """兑奖表"""
    user = models.ForeignKey(UserProfile, verbose_name="用户", on_delete=models.CASCADE)
    prize=models.ForeignKey(Prize, verbose_name="奖品", on_delete=models.CASCADE)
    title = models.CharField(max_length=15, null=True, blank=True, verbose_name='标题', help_text='最多15字')
    status = models.CharField(choices=(("0", "未使用"), ("1", "已使用")),default="0",max_length=6, verbose_name="使用状态")
    twoimg=models.ImageField(max_length=200, default='', upload_to='twoimg/', verbose_name='二维码')
    add_time = models.DateTimeField(default=datetime.now, verbose_name="添加时间")

    class Meta:
        verbose_name = "兑奖表"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.prize.title

    def image_url(self):
        return mark_safe('<img src="/media/{0}" class="field_img">'.format(self.twoimg))

    image_url.short_description = '二维码'

执行数据更新命令：

python manage.py makemigrations
python manage.py migrate

4.在apps/user_operation/views.py中新建BuyUseJiFen类：

#……
from users.models import UserProfile
from .serializers import MessageModelSerializer,GetPrizeModelSerializer
from .models import Message,GetPrize
from ad.models import Prize
from MyQR import myqr
import os,random
from gg.settings import BASE_DIR

#……


class BuyUseJiFen(APIView):
    """购买积分商品,生成二维码，控制每个用户领取一次"""
    renderer_classes = [JSONRenderer]  # 渲染器

    def get(self,request):
        token = request.GET.get('token')
        user = UserProfile.objects.filter(token=token).first()
        prizeid=request.GET.get('prizeid')
        if user and prizeid:
            prizeid_int = int(prizeid)
            prize = Prize.objects.filter(id=prizeid_int).first()
            if prize.get_num>=prize.all_num:
                # 如果奖品的领取数大于等于发布数，则返回已售罄
                prize.is_out=True
                prize.save()
                return HttpResponse('403')
            else:
                # 兑奖表，查看用户是否已经领取过了这个优惠券，如果已经领取过了则返回已经领取过了
                p=GetPrize.objects.filter(user=user,prize=prize).first()
                if p:
                    # 已经领取过了
                    return HttpResponse('404')
                else:
                    # 用户未领取
                    # 制作二维码
                    two_name=str(user.id)+'and'+prizeid+'.png'#生成二维码文件名
                    b = os.path.join(BASE_DIR, 'static/2/' + str(random.randint(1, 14)) + '.jpg')#背景图片路径
                    c_dir = os.path.join(BASE_DIR, 'media/twoimg')#生成二维码的存放目录
                    user_openid=user.open_id
                    url=prize.url+"?pid="+prizeid+"oid="+user_openid
                    myqr.run(words=url,version=5,level='H',picture=b,colorized=True,save_dir=c_dir,save_name=two_name)
                    # 生成兑奖表记录
                    new_getprize=GetPrize()
                    new_getprize.user=user
                    new_getprize.prize=prize
                    new_getprize.title=prize.title
                    new_getprize.twoimg='twoimg/'+two_name
                    new_getprize.save()
                    # 扣除对应积分
                    user.jifen=user.jifen-prize.price
                    user.save()
                    # 奖品被领取数+1
                    prize.is_out = False
                    prize.get_num += 1
                    prize.save()
                    return HttpResponse('200')
        else:
            return HttpResponse('参数不足')

5.在apps/user_operation/urls.py内配置路由：

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

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