You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 
flyapps/fir_ser/api/views/shoppingcart.py

258 lines
9.1 KiB

om rest_framework.views import APIView
from rest_framework.viewsets import ViewSetMixin, ModelViewSet
from api.utils.response import BaseResponse
from rest_framework.response import Response
from api.models import Course, CourseDetail, PricePolicy
from django.core.exceptions import ObjectDoesNotExist
from api.utils.exceptions import CommonException
from django_redis import get_redis_connection
from django.conf import settings
from api.utils.auth import ExpiringTokenAuthentication
import json
from api.utils.permission import LoginUserPermission
import redis
REDIS_CONN = redis.Redis(decode_responses=True)
class ShoppingCarView(APIView):
"""
1030 加入购物车失败
"""
authentication_classes = [ExpiringTokenAuthentication, ]
def post(self, request):
res = BaseResponse()
try:
# 1 获取前端传过来的course_id 以及price_policy_id user_id
course_id = request.data.get("course_id", "")
price_policy_id = request.data.get("price_policy_id", "")
user_id = request.user.id
# 2 验证数据的合法性
# 2.1 验证course_id是否合法
course_obj = Course.objects.get(pk=course_id)
# 2.2 校验价格策略是否能合法
# 查找课程关联的价格策略
price_policy_list = course_obj.price_policy.all()
price_policy_dict = {}
for price_policy in price_policy_list:
price_policy_dict[price_policy.pk] = {
"prcie": price_policy.price,
"valid_period": price_policy.valid_period,
"valid_period_text": price_policy.get_valid_period_display(),
"default": price_policy.pk == price_policy_id
}
if price_policy_id not in price_policy_dict:
raise CommonException(1001, "价格策略异常!")
# 3 构建我们想要的数据结构
# 价格策略对象
pp = PricePolicy.objects.get(pk=price_policy_id)
course_info = {
"id": course_id,
"name": course_obj.name,
"course_img": course_obj.course_img,
"relate_price_policy": price_policy_dict,
"default_price": pp.price,
"default_price_period": pp.valid_period,
"default_price_policy_id": pp.pk
}
# 4 写入redis
# 4.1 先拼接购物车的key
shopping_car_key = settings.SHOPPING_CAR_KEY % (user_id, course_id)
# 4.2 写入redis
print("------>")
REDIS_CONN.set(shopping_car_key, json.dumps(course_info))
res.msg = "加入购物车成功!"
except CommonException as e:
res.code = e.code
res.error = e.error
except Exception as e:
res.code = 1030
res.error = "加入购物车失败!"
return Response(res.dict)
def get(self, request):
res = BaseResponse()
try:
# 1 取到user_id
user_id = request.user.id
# 2 拼接购物车的key
shopping_car_key = settings.SHOPPING_CAR_KEY % (user_id, "*")
print("shopping_car_key",shopping_car_key)
# shopping_car_1_*
# shopping_car_1_asdgnlaksdj
# 3 去redis读取该用户的所有加入购物车的课程
# 3.1 先去模糊匹配出所有符合要求的key
all_keys = REDIS_CONN.keys(shopping_car_key)
print("all_keys",all_keys)
# 3.2 循环所有的keys 得到每个可以
shopping_car_list = []
for key in all_keys:
print("key",key)
course_info = json.loads(REDIS_CONN.get(key))
shopping_car_list.append(course_info)
res.data = {"shopping_car_list": shopping_car_list, "total": len(shopping_car_list)}
except Exception as e:
res.code = 1033
res.error = "获取购物车失败"
print("res.dict",res.dict)
return Response(res.dict)
def put(self, request):
res = BaseResponse()
try:
# 1 获取前端传过来的course_id 以及price_policy_id
course_id = request.data.get("course_id", "")
price_policy_id = request.data.get("price_policy_id", "")
user_id = request.user.id
# 2 校验数据的合法性
# 2.1 校验course_id是否合法
shopping_car_key = settings.SHOPPING_CAR_KEY % (user_id, course_id)
if not REDIS_CONN.exists(shopping_car_key):
res.code = 1035
res.error = "课程不存在"
return Response(res.dict)
# 2.2 判断价格策略是否合法
course_info = REDIS_CONN.hgetall(shopping_car_key)
price_policy_dict = json.loads(course_info["price_policy_dict"])
if str(price_policy_id) not in price_policy_dict:
res.code = 1036
res.error = "所选的价格策略不存在"
return Response(res.dict)
# 3 修改redis中的default_policy_id
course_info["default_policy_id"] = price_policy_id
# 4 修改信息后写入redis
REDIS_CONN.hmset(shopping_car_key, course_info)
res.data = "更新成功"
except Exception as e:
res.code = 1034
res.error = "更新价格策略失败"
return Response(res.dict)
def delete(self, request):
res = BaseResponse()
try:
# 获取前端传过来的course_id
course_id = request.data.get("course_id", "")
user_id = request.user.id
# 判断课程id是否合法
shopping_car_key = settings.SHOPPING_CAR_KEY % (user_id, course_id)
if not REDIS_CONN.exists(shopping_car_key):
res.code = 1039
res.error = "删除的课程不存在"
return Response(res.dict)
# 删除redis中的数据
REDIS_CONN.delete(shopping_car_key)
res.data = "删除成功"
except Exception as e:
res.code = 1037
res.error = "删除失败"
return Response(res.dict)
'''
1 post接口构建数据结构:
{
"id": 2,
"default_price_period": 14,
"relate_price_policy": {
"1": {
"valid_period": 7,
"valid_period_text": "1周",
"default": false,
"prcie": 100.0
},
"2": {
"valid_period": 14,
"valid_period_text": "2周",
"default": true,
"prcie": 200.0
},
"3": {
"valid_period": 30,
"valid_period_text": "1个月",
"default": false,
"prcie": 300.0
}
},
"name": "Django框架学习",
"course_img": "https://luffycity.com/static/frontend/course/3/Django框架学习_1509095212.759272.png",
"default_price": 200.0
}
2 get接口查询数据结构:
{
"data": {
"total": 2,
"shopping_car_list": [
{
"id": 2,
"default_price_period": 14,
"relate_price_policy": {
"1": {
"valid_period": 7,
"valid_period_text": "1周",
"default": false,
"prcie": 100
},
"2": {
"valid_period": 14,
"valid_period_text": "2周",
"default": true,
"prcie": 200
},
"3": {
"valid_period": 30,
"valid_period_text": "1个月",
"default": false,
"prcie": 300
}
},
"name": "Django框架学习",
"course_img": "https://luffycity.com/static/frontend/course/3/Django框架学习_1509095212.759272.png",
"default_price": 200
},
{
"id": 4,
"default_price_period": 30,
"relate_price_policy": {
"4": {
"valid_period": 30,
"valid_period_text": "1个月",
"default": true,
"prcie": 1000
},
"5": {
"valid_period": 60,
"valid_period_text": "2个月",
"default": false,
"prcie": 1500
}
},
"name": "Linux系统基础5周入门精讲",
"course_img": "https://luffycity.com/static/frontend/course/12/Linux5周入门_1509589530.6144893.png",
"default_price": 1000
}
]
},
"code": 1000,
"msg": ""
}
'''