创建订单并生成支付连接接口

 

1. goods/urls.py中注册路由

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

2. goods/views.py中写视图函数

from rest_framework.views import APIView
from rest_framework.permissions import AllowAny, IsAuthenticted
from rest_framework.response import Response
from .models import Goods,Orders
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).quanntize(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))
        # 3. 根据订单 生成支付连接
        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. 返回连接
        return Response({"code":0, "msg":"下单成功", "data":{"pay_url":pay_url}})

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 imoprt AliPay
from syl import settings
​
# 获取文件路径
app_private_key_path = os.path.join(setting.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,
    app_private_key_string=app_private_key_string,
    alipay_public_key_string=alipay_public_key_string,
    sign_type='RSA2'
    debug=settings.ALIPAY_DEBUG
)
​
def get_pay_url(out_trade_no, total_amount, subject):
    # 生成登录支付宝连接
    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_RETUEN_URL,
    )
    alipay_url = settings.ALIPAY_URL + "?" + order_string
    return alipay_url
​
def get_order_id()
    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
​
# 支付宝配置
ALIPAY_APPID = '2016101800716047' # 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
​

4. 测试