lf 前后端分离 (5) 优惠券
关于优惠券
优惠券主要通过前端传回来的course_id_list 创建数据结构
首先清空操作,将所有的优惠券清空,
并将所有优惠劵放到redis中的过程
1 import datetime 2 import json 3 import redis 4 5 REDIS_CONN = redis.Redis(decode_responses=True) 6 7 from rest_framework.views import APIView 8 from rest_framework.response import Response 9 10 from app01.models import * 11 from app01.utils.auth import LoginAuth 12 from app01.utils.response import BaseResponse 13 from app01.utils.exception import CommonException 14 15 from django.core.exceptions import ObjectDoesNotExist 16 from django.conf import settings 17 18 19 class AccountView(APIView): 20 authentication_classes = [LoginAuth] 21 22 def get_coupon_dict(self, request, course_id=None): 23 now = datetime.datetime.now() 24 coupon_record_list = CouponRecord.objects.filter( 25 account=request.user, 26 coupon__content_type=9, 27 coupon__object_id=course_id, 28 status=0, 29 coupon__valid_begin_date__lte=now, 30 coupon__valid_end_date__gte=now 31 ) 32 coupons = {} 33 34 for coupon_record in coupon_record_list: 35 coupons[coupon_record.pk] = { 36 37 "pk": coupon_record.pk, 38 "name": coupon_record.coupon.name, 39 "coupon_type": coupon_record.coupon.get_coupon_type_display(), 40 "money_equivalent_value": coupon_record.coupon.money_equivalent_value, 41 "off_percent": coupon_record.coupon.off_percent, 42 "minimum_consume": coupon_record.coupon.minimum_consume, 43 "valid_begin_date": coupon_record.coupon.valid_begin_date.strftime("%Y-%m-%d"), 44 "valid_end_date": coupon_record.coupon.valid_end_date.strftime("%Y-%m-%d"), 45 } 46 print("coupons", coupons) 47 48 return coupons 49 50 def post(self, request, *args, **kwargs): 51 # 1 获取数据 52 user = request.user 53 course_id_list = request.data.get("course_id_list") 54 response = BaseResponse() 55 try: 56 # 2 创建数据结构 57 # 清空操作 58 # 找到所有以account_userid_*，全部清空 59 del_list = REDIS_CONN.keys(settings.ACCOUNT_KEY % (user.pk, "*")) 60 if del_list: 61 REDIS_CONN.delete(*del_list) 62 63 price_list = [] 64 for course_id in course_id_list: 65 66 account_key = settings.ACCOUNT_KEY % (user.pk, course_id) 67 account_dict = {} 68 shopping_car_key = settings.SHOPPING_CAR_KEY % (user.pk, course_id) 69 70 # 判断课程是否存在购物车中 71 if not REDIS_CONN.exists(shopping_car_key): 72 raise CommonException("购物车不存在该课程", 1040) 73 74 # 将课程信息加入到每一个课程结算字典中 75 course_info = json.loads(REDIS_CONN.get(shopping_car_key)) 76 account_dict["course_info"] = course_info 77 78 # 课程价格加入到价格列表 79 price_list.append(float(course_info["default_price"])) 80 81 # 查询当前用户拥有未使用的，在有效期的且与当前课程相关的优惠券 82 account_dict["course_coupons"] = self.get_coupon_dict(request, course_id) 83 84 # 存储结算信息 85 REDIS_CONN.set(account_key, json.dumps(account_dict)) 86 87 print("account_dict",account_dict) 88 89 # 获取通用优惠券,加入redis中 90 91 REDIS_CONN.set("global_coupon_%s" % user.pk, json.dumps(self.get_coupon_dict(request))) 92 REDIS_CONN.set("total_price", sum(price_list)) 93 94 except CommonException as e: 95 response.code = e.code 96 response.msg = e.msg 97 98 except ObjectDoesNotExist as e: 99 response.code = 1001 100 response.msg = "课程不存下" 101 102 return Response(response.dict) 103 104 def get(self, request, *args, **kwargs): 105 106 res = BaseResponse() 107 try: 108 # 1 取到user_id 109 user_id = request.user.id 110 # 2 拼接购物车的key 111 account_key = settings.ACCOUNT_KEY % (user_id, "*") 112 # shopping_car_1_* 113 # shopping_car_1_asdgnlaksdj 114 # 3 去redis读取该用户的所有加入购物车的课程 115 # 3.1 先去模糊匹配出所有符合要求的key 116 all_keys = REDIS_CONN.scan_iter(account_key) 117 118 # 3.2 循环所有的keys 得到每个可以 119 account_course_list = [] 120 for key in all_keys: 121 122 course = json.loads(REDIS_CONN.get(key)) 123 temp = {} 124 for key, val in course["course_info"].items(): 125 temp[key] = val 126 coupon_list = [] 127 for key, val in course["course_coupons"].items(): 128 val["pk"] = key 129 coupon_list.append(val) 130 temp["coupon_list"] = coupon_list 131 132 account_course_list.append(temp) 133 134 global_coupons_dict = json.loads(REDIS_CONN.get("global_coupon_%s" % request.user.pk)) 135 total_price = REDIS_CONN.get("total_price") 136 global_coupons = [] 137 for key, val in global_coupons_dict.items(): 138 global_coupons.append(val) 139 res.data = { 140 "account_course_list": account_course_list, 141 "total": len(account_course_list), 142 "global_coupons": global_coupons, 143 "total_price": total_price 144 } 145 146 except Exception as e: 147 res.code = 1033 148 res.error = "获取购物车失败" 149 150 return Response(res.dict) 151 152 153 def cal_coupon_price(self,price,coupon_info): 154 155 coupon_type=coupon_info["coupon_type"] 156 money_equivalent_value=coupon_info.get("money_equivalent_value") 157 off_percent=coupon_info.get("off_percent") 158 minimum_consume=coupon_info.get("minimum_consume") 159 rebate_price=0 160 if coupon_type == "立减券": # 立减券 161 rebate_price=price-money_equivalent_value 162 if rebate_price <= 0: 163 rebate_price=0 164 elif coupon_type == "满减券": # 满减券 165 if minimum_consume > price: 166 raise CommonException(3000,"优惠券未达到最低消费") 167 else: 168 rebate_price=price-money_equivalent_value 169 elif coupon_type == "折扣券": 170 print("VVVV",price,off_percent) 171 rebate_price=price*off_percent/100 172 173 return rebate_price 174 175 def put(self,request, *args, **kwargs): 176 ''' 177 choose_coupons: 178 { 179 choose_coupons={"1":"2","2":"3","global_coupon_id":5} 180 is_beli:true 181 } 182 ''' 183 res=BaseResponse() 184 try: 185 186 # 1 获取数据 187 choose_coupons=request.data.get("choose_coupons") 188 is_beli=request.data.get("is_beli") 189 user_pk=request.user.pk 190 191 # 2 获取结算课程列表 192 cal_price={} 193 data=self.get(request).data.get("data") 194 account_course_list=data.get("account_course_list") 195 account_course_info={} 196 for account_course in account_course_list: 197 temp={ 198 "coupons":{}, 199 "default_price":account_course["default_price"] 200 } 201 account_course_info[account_course["id"]]=temp 202 203 for item in account_course["coupon_list"]: 204 temp["coupons"][item["pk"]]=item 205 206 print("account_course_info",account_course_info) 207 208 price_list=[] 209 total_price=0 210 for key,val in account_course_info.items(): 211 if str(key) not in choose_coupons: 212 price_list.append(val["default_price"]) 213 cal_price[key]=val["default_price"] 214 else: 215 coupon_info=val.get("coupons").get(str(choose_coupons[str(key)])) 216 rebate_price=self.cal_coupon_price(val["default_price"],coupon_info) 217 price_list.append(rebate_price) 218 cal_price[key]=rebate_price 219 220 print("课程优惠券后价格列表price_list",price_list) 221 total_price=sum(price_list) 222 # 3 计算通用优惠券的价格 223 global_coupon_id=choose_coupons.get("global_coupon_id") 224 if global_coupon_id: 225 226 global_coupons=data.get("global_coupons") 227 print("global_coupons",global_coupons) 228 global_coupon_dict={} 229 for item in global_coupons: 230 global_coupon_dict[item["pk"]]=item 231 232 total_price=self.cal_coupon_price(total_price,global_coupon_dict[global_coupon_id]) 233 print("通用优惠券",global_coupon_dict[global_coupon_id]["coupon_type"]) 234 print("计算后total_price=",total_price) 235 236 # 计算贝里 237 if json.loads(is_beli): 238 total_price=total_price-request.user.beli/10 239 if total_price<0: 240 total_price=0 241 print("贝里数计算后",total_price) 242 243 #res.total_price=total_price 244 cal_price["total_price"]=total_price 245 res.data=cal_price 246 247 except Exception as e: 248 res.code=500 249 res.msg="结算错误!"+str(e) 250 251 return Response(res.dict)
