支付宝流程

1.创建goods模型

1.1创建商品模型goods

python ../manage.py startapp goods # 创建goods模型
1.2在setting.py中注册goods模型（第一步）
INSTALLED_APPS = [
     'goods.apps.GoodsConfig', 
]
# 注：pycharm无法联想，需要把apps文件夹设置为源根
1.3 syl/urls.py添加路由（第二步）
urlpatterns = [ 
    path('goods/', include('goods.urls')), 
]
1.4 创建 goods/urls.py路由文件（第三步）
from django.urls import path, re_path 
from . import views 
urlpatterns = [ 

]

2 表结构分析

2.1商品表与订单表

goods/models.py

2.2用户表和vip表

from django.db import models

from django.contrib.auth.models import AbstractUser

class Base(models.Model):
    create_time=models.DateTimeField('创建时间',auto_now_add=True,null=True)
    update_time=models.DateTimeField('更新时间',auto_now=True,null=True)
    class Meta:
        abstract=True


# 创建Vip表，并和用户进行关联
class Vip(Base):
    vip_choise = (
    ('0', '普通用户'),
    ('1', '普通会员'),
    ('2', '高级会员'),   )
    title = models.CharField('vip名称', max_length=16)
    vip_type = models.CharField('Vip种类',choices=vip_choise ,max_length=4)
    desc = models.CharField('vip描述',max_length=255)
    period = models.IntegerField('有效期', default=365)
    class Meta:
        db_table = 'tb_vip'
    def __str__(self):
        return self.title


#用户表
class User(AbstractUser):
    phone = models.CharField('手机号',max_length=20)
    img = models.ImageField(upload_to='user',null=True)
    nick_name = models.CharField('昵称',max_length=20)
    address = models.CharField('地址',max_length=255)
    vip = models.ForeignKey(Vip, on_delete=models.SET_NULL, default=None, null=True)
    vip_expiration = models.DateField('vip到期时间', blank=True, default=None, null=True)
    class Meta:
        db_table = 'tb_user'
user/models.py

2.3添加购买课程表

#用户购买的课程
class UserCourse(Base):
    user=models.ForeignKey('user.User',on_delete=models.CASCADE,related_name='paycourse')
    course = models.ForeignKey('course.Course', on_delete=models.CASCADE, related_name='payuser')
    class Meta:
        db_table = 'tb_usercourse'
    def __str__(self):
        return "用户:%s, 课程:%s" % (self.user.username, self.course.title)
course/models.py

2.4 admin中注册

from django.contrib import admin

# Register your models here.
from . import models

admin.site.register(models.UserCourse)
course/admin.py
from django.contrib import admin

# Register your models here.
from .models import *

admin.site.register(Goods)
admin.site.register(Orders)
goods/admin.py
from django.contrib import admin

# Register your models here.


from .models import *

admin.site.register(User)

admin.site.register(Vip)
user/admin.py

3测试沙箱支付宝链接

https://openhome.alipay.com/platform/appDaily.htm

 

 

 

 3.1密钥

-----BEGIN RSA PRIVATE KEY-----

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

-----END RSA PRIVATE KEY-----
goods/keys/app_private_key.pem

支付宝公钥

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDIgHnOn7LLILlKETd6BFRJ0GqgS2Y3mn1wMQmyh9zEyWlz5p1zrahRahbXAfCfSqshSNfqOmAQzSHRVjCqjsAw1jyqrXaPdKBmr90DIpIxmIyKXv4GGAkPyJ/6FTFY99uhpiq0qadD/uSzQsefWo0aTvP/65zi3eof7TcZ32oWpwIDAQAB
-----END PUBLIC KEY-----
goods/keys/alipay_public_key.pem

测试是否能生成支付宝链接

# -*- coding: utf-8 -*-
from alipay import AliPay

# app_private_key_string = open('app_private_key.pem').read()
app_private_key_string = open('app_private_key.pem').read()
alipay_public_key_string = open( 'alipay_public_key.pem').read()


def get_alipay_url():
    alipay=AliPay(
            # 2016102600762709
        appid="2016102600762709",  # 沙箱appid
        app_notify_url=None,  # 默认回调url
        app_private_key_string=app_private_key_string,
        # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
        alipay_public_key_string=alipay_public_key_string,
        sign_type="RSA",  # RSA 或者 RSA2
        debug=True,  # 默认False,我们是沙箱，所以改成True(让访问沙箱环境支付宝地址)
    )
    # 调用支付接口，生成支付链接
    order_string = alipay.api_alipay_trade_page_pay(
        out_trade_no = "201612226",   # 订单id，应该从前端获取
        total_amount=str(0.01), # 订单总金额
        subject="测试阿里云付款", # 付款标题信息
        return_url=None, # 付款成功回调地址(可以为空)
        notify_url=None # 付款成功后异步通知地址（可以为空）
    )
    pay_url = "https://openapi.alipaydev.com/gateway.do?" + order_string
    print( pay_url)   # 将这个url复制到浏览器，就会打开支付宝支付页面




if __name__ == '__main__':
    get_alipay_url()
    # query_pay()
goods/keys/alipy_test.py

4创建订单并生成支付链接接口

4.1 goods/urls.py中注册路由 
from django.urls import path
from . import views
urlpatterns = [
    path('getpayurl/', views.PayUrlView.as_view()),
    path('peyment/', views.PayMentView.as_view())

]
goods/urls.py

4.2 goods/views.py中写视图

from rest_framework.views import APIView
from rest_framework.permissions import AllowAny,IsAuthenticated
from rest_framework.response import Response
from .models import Goods,Orders
from course.models import UserCourse

from goods.utils import get_order_id, get_pay_url, alipay

from decimal import Decimal
from user.models import User

class PayUrlView(APIView):
    permission_classes = (IsAuthenticated,)
    def post(self,request):
        goods_id=request.data.get('goods_id')
        goods=Goods.objects.get(id=goods_id)
        user=request.user
        order_id = get_order_id()
        if user.vip.vip_type == '1': # 普通会员
            goods_price = goods.price * Decimal('0.80').quantize(Decimal('0.00'))
        elif user.vip.vip_type == '2': # 高级会员
            goods_price = goods.price * Decimal('0.60').quantize(Decimal('0.00'))
        else: # 普通用户
            goods_price=goods.price
        goods_price = Decimal(goods_price).quantize(Decimal('0.00'))
        order = Orders(user=user, goods=goods, order_id=order_id, pay_method=1,total_amount=goods_price)
        order.save()
        print(order.total_amount,type(order.total_amount))
        # 3. 根据订单 生成支付链接
        subject="实验楼订单:%s, 价格:%s" % (order.order_id, order.total_amount)
        pay_url=get_pay_url(order.order_id, order.total_amount, subject)
        # 4. 返回链接
        return Response({"code": 0, "msg": "下单成功", "data": {"pay_url": pay_url}})

from course.models import UserCourse
class PayMentView(APIView):
    permission_classes = (AllowAny,)
    def post(self,request):
        data=request.data
        sign=data.pop('sign')
        order=Orders.objects.get(order_id=data['out_trade_no'])
        order.trade_no=data['trade_no']
        order.pay_time=data['timestamp']
        order.status=2
        order.save()
        user=order.user
        course=order.goods.course
        UserCourse.objects.create(user=user,course=course)
        return Response({"code":0,"msg":"购买成功"})
goods/views.py
4.3 goods/utils.py中生成随机订单函数和生成支付URL函数 
import datetime
import os
import random
from alipay import AliPay
from syl import settings
app_private_key_path = os.path.join(settings.BASE_DIR, "apps/goods/keys/app_private_key.pem")
alipay_public_key_path = os.path.join(settings.BASE_DIR, "apps/goods/keys/alipay_public_key.pem")
with open(app_private_key_path) as f:
    app_private_key_string = f.read()
with open(alipay_public_key_path) as f:
    alipay_public_key_string = f.read()
alipay = AliPay(
    appid=settings.ALIPAY_APPID,
    app_notify_url=None,  # 默认回调url
    app_private_key_string=app_private_key_string,
    alipay_public_key_string=alipay_public_key_string,
    # app_private_key_path=app_private_key_path,
    # alipay_public_key_path=alipay_public_key_path,
    sign_type="RSA",
    debug=settings.ALIPAY_DEBUG
)
def get_pay_url(out_trade_no, total_amount, subject):
    order_string = alipay.api_alipay_trade_page_pay(
        out_trade_no=out_trade_no,
        total_amount=str(total_amount),
        subject=subject,
        return_url=settings.ALIPAY_RETURN_URL,
    )
    # 响应登录支付宝连接
    # 真实环境电脑网站支付网关：https://openapi.alipay.com/gateway.do? + order_string
    # 沙箱环境电脑网站支付网关：https://openapi.alipaydev.com/gateway.do? + order_string alipay_url = settings.ALIPAY_URL + "?" + order_string return alipay_url
    alipay_url = settings.ALIPAY_URL + "?" + order_string
    return alipay_url
def get_order_id():
    """
    SYL202008241212121200005/24
    生成订单号: 格式: SYL + 年月日时分秒 + 5位随机数
    :return:
    """
    d = datetime.datetime.now()
    base = 'SYL'
    time_str = '%04d%02d%02d%02d%02d%02d' % (d.year, d.month, d.day, d.hour, d.minute, d.second)
    rand_num = str(random.randint(10000, 99999))
    return base + time_str + rand_num
goods/utils.py

4.4syl/setings.py中配置支付相关参数 

# 支付宝配置
ALIPAY_APPID = '2016102600762709' # 沙箱环境中alipay应用ID
ALIPAY_DEBUG = True
ALIPAY_URL = 'https://openapi.alipaydev.com/gateway.do' # alipay沙箱环 境支付宝网管
ALIPAY_RETURN_URL = 'http://127.0.0.1:8888/payment/callback/' # 支付完成后支 付宝回调我们应用的地址
syl/settings.py

关联购买记录表

from goods.serializers import GoodsSerializer

class CourseDeepSerializer(CourseSerializer):
    goods_set=GoodsSerializer(many=True)
    chapters = ChaptersSerializer(many=True)
goods/serializers.py
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原文地址：https://www.cnblogs.com/xiaoxiamiaichiyu/p/13951096.html