结算接口
from rest_framework.views import APIView from rest_framework.viewsets import ViewSetMixin,ModelViewSet from api.utils.auth_class import UserAuth from api.utils.response import BaseResponse from rest_framework.response import Response from api.utils.exceptions import CommonException from api.models import Course,CouponRecord,PricePolicy,CourseDetail import datetime class PaymentView(APIView,ViewSetMixin): """ 支付接口===订单接口: 1 接收数据 2 校验数据 3 生成订单（默认未支付状态） --- Order --- OrderDetail --- OrderDetail --- OrderDetail 4 调支付宝的支付接口: 返回的post：修改订单，修改优惠券，修改贝里 返回的get： 查看订单状态 """ authentication_classes = [UserAuth] def create(self, request, *args, **kwargs): ''' 请求发送的数据: { courses:{ 1:{ choose_price_id:1, coupon_id:2, }, 2:{ choose_price_id:4, coupon_record_id:3, }, }, global_coupon_id:3, beli:2000, total_money:2000 } 计算价格优先级 （课程1原价格*课程1优惠券+课程2原价格*课程2优惠券）*通用优惠券-贝里/10 ''' res=BaseResponse() try: # 1 获取数据 user = request.user beli = int(request.data.get("beli", 0)) courses_dict=request.data.get("courses") global_coupon_id=request.data.get("global_coupon_id") total_money=request.data.get("total_money") # 2 校验数据 # 2.1 校验内里数是否在登录用户实际拥有范围内 if user.beli < beli: raise CommonException("贝里数有问题！",1004) # 2.2 校验课程信息 now = datetime.datetime.now() course_price_list=[] for course_pk,course_info in courses_dict.items(): # 2.2.2 校验课程是否存在 course_obj=Course.objects.filter(pk=course_pk).first() if not course_obj: raise CommonException("课程不存在！",1002) if course_obj.status != 0: raise CommonException("课程未上线或者已下线！", 1005) # 2.2.3 校验价格策略 choose_price_id=course_info.get("choose_price_id") price_policy_all=course_obj.price_policy.all() if choose_price_id not in [obj.pk for obj in price_policy_all]: raise CommonException("价格策略错误！",1003) # 2.2.4 校验课程优惠券 coupon_record_id=course_info.get("coupon_record_id") coupon_record=CouponRecord.objects.filter(pk=coupon_record_id, user=user, status=0, coupon__valid_begin_date__lt=now, coupon__valid_end_date__gt=now, ).first() if not coupon_record: raise CommonException("优惠券有问题！", 1006) rel_course_obj=coupon_record.coupon.content_object if course_obj != rel_course_obj: raise CommonException("优惠券与课程不匹配！", 1007) # 计算优惠后的价格 price=PricePolicy.objects.filter(pk=choose_price_id).first().price rebate_price=self.cal_price(price,coupon_record) course_price_list.append(rebate_price) # 2.3 校验通用优惠券合法性 global_coupon_record = CouponRecord.objects.filter(pk=global_coupon_id, user=user, status=0, coupon__valid_begin_date__lt=now, coupon__valid_end_date__gt=now, ).first() if not global_coupon_record: raise CommonException("通用优惠券有问题！", 1009) # 2.4 校验最终价格是否一致 cal_price = self.cal_price(sum(course_price_list), global_coupon_record) final_price = cal_price - beli / 10 if final_price < 0: final_price = 0 if total_money != final_price : raise CommonException("支付价格有问题！", 1010) # 3 生成订单 # Order记录 # OrderDetail # OrderDetail # 4 调用支付宝接口 # alipay = ali() # 生成支付的url # query_params = alipay.direct_pay( # subject="Django课程", # 商品简单描述 # out_trade_no="x2" + str(time.time()), # 商户订单号 # total_amount=money, # 交易金额(单位: 元 保留俩位小数) # ) # # pay_url = "https://openapi.alipaydev.com/gateway.do?{}".format(query_params) # # return redirect(pay_url) # 注意： # POST请求访问notify_url： # 更改订单 # 更改优惠券 # 更改贝里数 # GET请求return_url，用于页面的跳转展示 except CommonException as e: res.code=1004 res.error=e.error return Response(res.dict) def cal_price(self,price,coupon_record): """ price：原价格 coupon_record：优惠券对象 目的：计算优惠后的价格 :param price: :param coupon_record: :return: """ # 获取优惠券的类型 coupon_type=coupon_record.coupon.coupon_type if coupon_type == 0: # 立减券 money_equivalent_value=coupon_record.coupon.money_equivalent_value rebate_price=price - money_equivalent_value if rebate_price < 0 : rebate_price=0 elif coupon_type == 1: # 满减券 minimum_consume=coupon_record.coupon.minimum_consume if price > minimum_consume: money_equivalent_value = coupon_record.coupon.money_equivalent_value rebate_price=price-money_equivalent_value else: raise CommonException("优惠券不符合条件",1008) elif coupon_type == 2: off_percent=coupon_record.coupon.off_percent rebate_price=price*(off_percent/100) else: rebate_price=price return rebate_price