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

urlpatterns = [
    path('getpayurl/',views.PayUrlView.as_view()),
]

1.2 goods/views.py 中写视图函数

from rest_framework.views import APIView 
from rest_framework.permissions import AllowAny, IsAuthenticated 
from rest_framework.response import Response 
from .models import Goods,Orders,GoodsCourse 
from goods.utils import get_order_id, get_pay_url, alipay
from decimal import Decimal

class PayUrlView(APIView):
    permission_classes = (IsAuthenticated,)

    def post(self,request):
        #1.获取课程id，获取购买途径(普通购买，促销购买）获取用户
        goods_id=request.data.get('goods_id')
        goods=Goods.objects.get(id=goods_id)
        user=request.user
        #2.下订单
        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,status=1,total_amount=goods_price)
        order.save()
        print(order.total_amount,type(order.total_amount))
        #根据订单  生成支付连接
        subject='实验楼:%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}})

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

#获取文件路径
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()

#创建支付宝支付对象
alipay=AliPay(
    appid=settings.ALIPAY_APPID,
    app_notify_url=None,
    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='RSA2',
    debug=settings.ALIPAY_DEBUG
)

def get_pay_url(out_trade_no,total_amount,subject):
    #生成登录支付宝链接
    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

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

ALIPAY_APPID='2016102600761321'    # 沙箱环境中alipay应用ID
ALIPAY_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)
ALIPAY_URL='https://openapi.alipaydev.com/gateway.do'  #ALIPAY沙箱环境网管
ALIPAY_RETURN_URL='http://127.0.0.1:8888/payment/callback/' #完成支付后回调我们应用的地址