使用Django搭建一个简易但功能齐全的购物网站

from django.shortcuts import render, redirect from .models import CarModel, HotModel, OrderModel, ItemModel, CategoryModel, UserInfoModel, CommentModel, MarkModel from django.http import JsonResponse import numpy as np def index(request): hots = HotModel.objects.all() categories = CategoryMzodel.objects.all() context = { 'hots': hots, 'categories': categories } return render(request, 'index.html', context=context) def login(request): if request.method == 'GET': return render(request, 'login.html') else: # 用户登录 username = request.POST.get('username') password = request.POST.get('password') if not (username or password): return JsonResponse({'code': 400, 'message': '缺少必传的参数'}) user = UserInfoModel.objects.filter(username=username, password=password).first() if not user: return JsonResponse({'code': 400, 'message': '账号或密码错误'}) request.session['login_in'] = True request.session['username'] = user.username request.session['user_id'] = user.id return JsonResponse({'code': 200}) def register(request): if request.method == 'GET': return render(request, 'register.html') else: username = request.POST.get('username') password1 = request.POST.get('password1') password2 = request.POST.get('password2') address = request.POST.get('address') phone = request.POST.get('phone') if not (username or password1 or password2): return JsonResponse({'code': 400, 'message': '缺少必传的参数'}) if password1 != password2: return JsonResponse({'code': 400, 'message': '两次输入的密码不一致！'}) flag = UserInfoModel.objects.filter(username=username).first() if flag: return JsonResponse({'code': 400, 'message': '该用户名已存在'}) UserInfoModel.objects.create( username=username, password=password1, money=0, address=address, phone=phone ) return JsonResponse({'code': 200}) def logout(request): # 退出登录 flag = request.session.clear() return redirect('/') def item_detail(request, item_id): # 物品详情 item = ItemModel.objects.get(id=item_id) comments = CommentModel.objects.filter(item_id=item_id) user_id = request.session.get('user_id') if user_id: flag_mask = MarkModel.objects.filter(item_id=item_id, user_id=user_id).first() else: flag_mask = False context = { 'item': item, 'comments': comments, 'flag_mask': flag_mask } return render(request, 'item_detail.html', context=context) def item_list(request, category_id): if request.method == 'GET': # 商品列表 items = ItemModel.objects.filter( category_id=category_id ) context = { 'items': items } return render(request, 'item_list.html', context=context) def add_car(request): if request.method == 'POST': # 加入购物车 item_id = request.POST.get('item_id') user_id = request.session.get('user_id') item = ItemModel.objects.filter( id=item_id ).first() CarModel.objects.create( item_id=item_id, user_id=user_id, price=item.price, ) return JsonResponse({'code': 200}) def add_order(request): if request.method == 'POST': # 商品购买，生成订单 item_id = request.POST.get('item_id') user_id = request.session.get('user_id') car_id = request.POST.get('car_id') item = ItemModel.objects.filter( id=item_id ).first() # 校验余额是否充足 user = UserInfoModel.objects.filter( id=user_id ).first() if user.money < item.price: return JsonResponse({'code': 400, 'message': '余额不足，请充值'}) if item.number == 0: return JsonResponse({'code': 400, 'message': '该商品以售完'}) OrderModel.objects.create( item_id=item_id, user_id=user_id, price=item.price, ) # 扣除余额 user.money = user.money - item.price user.save() # 商品数量减少 item.number = item.number - 1 item.save() if car_id: # 如果是从购物车中点击购买的 CarModel.objects.filter( id=car_id ).update( is_pay=True ) return JsonResponse({'code': 200}) def my_car(request): user_id = request.session.get('user_id') if request.method == 'GET': # 我的购物车 cars = CarModel.objects.filter( user_id=user_id, is_pay=False ) context = { 'cars': cars } return render(request, 'my_car.html', context=context) else: # 删除购物车 car_id = request.POST.get('car_id') CarModel.objects.filter( id=car_id ).first().delete() return JsonResponse({'code': 200}) def my_order(request): user_id = request.session.get('user_id') if request.method == 'GET': # 我的订单 orders = OrderModel.objects.filter( user_id=user_id ) context = { 'orders': orders } return render(request, 'my_order.html', context=context) else: # 删除订单 order_id = request.POST.get('order_id') OrderModel.objects.filter( id=order_id ).first().delete() return JsonResponse({'code': 200}) def my_info(request): user_id = request.session.get('user_id') if request.method == 'GET': # 个人信息界面 info = UserInfoModel.objects.filter( id=user_id ).first() context = { 'info': info } return render(request, 'my_info.html', context=context) else: # 更新个人信息 username = request.POST.get('username') password = request.POST.get('password') phone = request.POST.get('phone') address = request.POST.get('address') if not (username or password or phone or address): return JsonResponse({'code': 400, 'message': '参数不能为空'}) UserInfoModel.objects.filter( id=user_id ).update( username=username, password=password, phone=phone, address=address ) return JsonResponse({'code': 200}) def category_count(request): if request.method == 'GET': return render(request, 'category_count.html') else: data_list = [] categories = CategoryModel.objects.all() for category in categories: name = category.name item_count = category.itemmodel_set.all().count() data_list.append({ 'name': name, 'value': item_count }) return JsonResponse({'code': 200, 'data': data_list}) def top_up(request): user_id = request.session.get('user_id') user = UserInfoModel.objects.filter( id=user_id ).first() if request.method == 'GET': # 显示充值界面 context = { 'user': user } return render(request, 'top_up.html', context=context) else: money = request.POST.get('money') if not money: return JsonRespon