python-Web-django-商城-不登陆添加购物车

utils:

# 商品多级联动
def get_category(categorys)->dict:
    '''
    :param:商品类性
    :return: {{[],[]},{[],[]},{[],[]}}
    '''
    dict1 = forCategory(categorys)
    return dict1

def forCategory(categorys):
    '''递归'''
    sum = {}
    # if str(categorys) == "<QuerySet []>":
    #     return Goods.objects.filter(category=category)
    for category in categorys:
        new_category = Category.objects.filter(category_pid=category.id)
        dict1 = forCategory(new_category)
        if dict1 == {}:
            dict1 = Goods.objects.filter(category=category)
        sum[category] = dict1

    return sum

 

'''个人虚拟购物车'''
import datetime
from app01.models import Cart


class PersonCart():
    '''个人虚拟购物车'''
    def __init__(self):
        self.cart = None
        self.time = datetime.datetime.now()


    # 创建浏览者购物车
    def getCart(self,goodsId,cart_num,cartIdList:list)->list:
        self.cart = Cart(goods_id=goodsId,member_id=16,cart_num=cart_num)
        self.cart.save()
        cartIdList.append(self.cart.id)
        return cartIdList

    # 删除浏览者购物车
    @staticmethod
    def delCart(cartIdList:list):
        ''''''
        for cartId in cartIdList:
            Cart.objects.filter(id=cartId).delete()

    # 浏览者购物添加到用户购物车里
    @staticmethod
    def addCart(cartIdList:list,memberId):
        if cartIdList is not None:
            for cartId in cartIdList:
                Cart.objects.filter(id=cartId).update(member_id=memberId)

 

views:

from django.shortcuts import render,HttpResponse,redirect
from app01.models import *
from app01.utils.function import get_category
import json
from app01.utils.personCart import PersonCart
from app01.utils.personRedis import Redis


def index(request):
    #获取用户id，用户名
    # member_session_id=request.session.get('memberId')
    #
    # member_session_name=request.session.get('memberName')
    from app01.utils.personSession import PersonSession
    person = PersonSession(request)
    member_session_id = person.session.get('memberId')
    member_session_name = person.session.get('memberName')


    if (request.COOKIES is not None) and (member_session_id is not None):
        # 检查是否以前有浏览者登陆
        checkPerson(request,member_session_id)
    if member_session_id is None:
        member_session_id = 16

    # 拿取商品列表(缓存中)
    redis = Redis()

    goods1 = redis.get('goods1')
    if goods1 is None:
        goods1=Goods.objects.filter(category__category_pid=1)[:4]
        redis.set('goods1', goods1)
    goods2 = redis.get('goods2')
    if goods2 is None:
        goods2 = Goods.objects.filter(category__category_pid=2)[:4]
        redis.set('goods2', goods2)
    goods3 = redis.get('goods3')
    if goods1 is None:
        goods3 = Goods.objects.filter(category__category_pid=3)[:4]
        redis.set('goods3', goods3)
    goods4 = redis.get('goods4')
    if goods4 is None:
        goods4 = Goods.objects.filter(category__category_pid=4)[:4]
        redis.set('goods4', goods4)
    goods5 = redis.get('goods5')
    if goods1 is None:
        goods5 = Goods.objects.filter(category__category_pid=5)[:4]
        redis.set('goods5', goods5)
    goods6 = redis.get('goods6')
    if goods6 is None:
        goods6 = Goods.objects.filter(category__category_pid=6)[:4]
        redis.set('goods6',goods6)



    # 拿取商品种类
    category1=Category.objects.filter(category_name='新鲜水果').first()
    category2=Category.objects.filter(category_name='海产水产').first()
    category3=Category.objects.filter(category_name='猪牛羊肉').first()
    category4=Category.objects.filter(category_name='禽类蛋类').first()
    category5=Category.objects.filter(category_name='新鲜蔬菜').first()
    category6=Category.objects.filter(category_name='速冻食品').first()


    #商品字典
    GOODSS = {
        category1:goods1,
        category2:goods2,
        category3:goods3,
        category4:goods4,
        category5:goods5,
        category6:goods6
              }

    cart_num = 0
    cart_nums = Cart.objects.filter(member_id=member_session_id)
    for i in cart_nums:
        cart_num += int(i.cart_num)

    # 商品多级联动
    category_objs = Category.objects.filter(category_pid=0)
    category_objs_san = get_category(category_objs)

    return render(request,'app01_index.html',locals())



# 检查浏览者登陆了
def checkPerson(request,memberId):
    '''
    :return: 
    '''
    # 1 把浏览者购物添加到用户购物车里
    # 2 并删除浏览者购物车
    # 3 清道夫
    cartIdList = request.COOKIES.get('cartIdList')
    # 1 把浏览者购物添加到用户购物车里
    PersonCart.addCart(cartIdList,memberId)
    # 2 并删除浏览者购物车
    rep = HttpResponse()
    rep.delete_cookie('cartIdList')
    # 3 清道夫
    Cart.objects.filter(member_id=16).delete()
    Cart.objects.filter(member_id=None).delete()