创建订单并生成支付链接接口

1.创建订单并生成支付链接接口

1.1 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())
]

1.2 goods/views.py 中写视图函数 

from django.shortcuts import render
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 decimal import Decimal
from goods.utils import get_order_id, get_pay_url,alipay
# Create your views here.
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"})

1.3 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

1.4 syl/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