基于Django Mysql微信小程序的多人协同点餐系统全部资料+详细文档.zip

# Order-WechatMini #后端 ##Cart- 购物车 ###View.py-控制器层 ```python import json from django.http import HttpResponse from django.shortcuts import render from django.utils.safestring import mark_safe from . import redis def index(request): return render(request, 'Cart/index.html', {}) def room(request, room_name): return render(request, 'Cart/room.html', { 'room_name_json': mark_safe(json.dumps(room_name)) }) def add_menu(request, desk): detail = redis.creat_detail(desk, request.POST.get('name'), str(request.POST.get('num'))) redis.set_cache(detail) return HttpResponse() def del_menu(request, desk): detail = redis.creat_detail(desk, request.POST.get('name'), str(request.POST.get('num'))) redis.del_cache(detail) return HttpResponse() def clean_menu(request, desk): redis.clean_cache(desk) return HttpResponse() def get_menu(request, desk): return HttpResponse(redis.get_cache(desk)) ``` ###consumers.py websocket 加减商品到购物车 ```python from asgiref.sync import async_to_sync from channels.generic.websocket import WebsocketConsumer import json from . import redis class ChatConsumer(WebsocketConsumer): def connect(self): self.room_name = self.scope['url_route']['kwargs']['room_name'] self.room_group_name = 'chat_%s' % self.room_name # Join room group async_to_sync(self.channel_layer.group_add)( self.room_group_name, self.channel_name ) self.accept() def disconnect(self, close_code): # Leave room group async_to_sync(self.channel_layer.group_discard)( self.room_group_name, self.channel_name ) # Receive message from WebSocket def receive(self, text_data): text_data_json = json.loads(text_data) message = text_data_json['message'] cache_list = json.loads(message) desk = int(self.scope['url_route']['kwargs']['room_name']) # 处理请求 if cache_list['action'] == "+": redis.set_cache(cache_list['detail']) if cache_list['action'] == "-": redis.del_cache(cache_list['detail']) if cache_list['action'] == "*": redis.clean_cache(desk) # Send message to room group async_to_sync(self.channel_layer.group_send)( self.room_group_name, { 'type': 'chat_message', 'message': redis.get_cache(desk) } ) # Receive message from room group def chat_message(self, event): message = event['message'] # Send message to WebSocket self.send(text_data=json.dumps({ 'message': json.dumps(message) })) ``` ###url 路由 ```python from django.urls import path from . import views from django.conf.urls import url urlpatterns = [ path('', views.index, name='index'), url(r'^(?P<room_name>[^/]+)/$', views.room, name='room'), path('<int:desk>/add/', views.add_menu), path('<int:desk>/del/', views.del_menu), path('<int:desk>/clean/', views.clean_menu), path('<int:desk>/', views.get_menu), ] ``` ##Data ORM表结构和核心数据（菜单和订单） ###models.py 表结构 ```python from django.db import models from django.db.models import Sum from django.db.models.signals import post_save from django.dispatch import receiver from django.utils.html import format_html from django.core import serializers class MenuType(models.Model): Name = models.CharField('菜品分类', max_length=50, primary_key=True) Sort = models.DecimalField('排序', max_digits=20, decimal_places=0, default=0) def __str__(self): return self.Name class Meta: verbose_name_plural = '菜品分类' class Menu(models.Model): Name = models.CharField('菜名', max_length=50, primary_key=True) Type = models.ForeignKey(MenuType, null=True, on_delete=models.CASCADE, verbose_name='菜品分类', related_name='Menus') Price = models.DecimalField('价格', max_digits=5, decimal_places=2) Img = models.ImageField('照片', upload_to='img') Introduction = models.CharField('简介', max_length=50) def __str__(self): return self.Name class Meta: verbose_name_plural = '菜单' class User(models.Model): OpenId = models.CharField('用户id', max_length=50, primary_key=True) Name = models.CharField('昵称', max_length=50) Session = models.CharField('session', max_length=50) MRP = models.DecimalField('积分', default=0, decimal_places=0,max_digits=10) def __str__(self): return self.Name class Meta: verbose_name_plural = '用户' class Desk(models.Model): DeskMum = models.DecimalField('桌号', max_digits=5, decimal_places=0, primary_key=True) def __str__(self): return str(self.DeskMum) class Meta: verbose_name_plural = '桌号' class Order(models.Model): State_CHOICES = ( ('0', '未付款'), ('1', '微信'), ('2', '支付宝'), ('3', '现金'), ) Cook_CHOICES = ( ('1', '已做'), ('0', '未做'), ) Off = ( ('1', '原价'), ('0.98', '98折'), ('0.88', '88折'), ) OrderId = models.DecimalField('订单号', max_digits=20, decimal_places=0, primary_key=True) User = models.ForeignKey(User, null=False, to_field='OpenId', on_delete=models.DO_NOTHING, verbose_name='用户') Desk = models.ForeignKey(Desk, null=False, on_delete=models.DO_NOTHING, verbose_name='桌号') Time = models.DateTimeField(auto_now_add=True, verbose_name='时间') Total = models.DecimalField('总金额', max_digits=10, decimal_places=2, default=0) Off = models.CharField(max_length=6, choices=Off, verbose_name='折扣', default='1') PayTotal = models.DecimalField('实付金额', max_digits=10, decimal_places=2, default=0) OrderState = models.CharField(max_length=6, choices=State_CHOICES, verbose_name='付款状态', default='0') CookState = models.CharField(max_length=6, choices=Cook_CHOICES, verbose_name='后厨状态', default='0') Comments = models.CharField(max_length=200, verbose_name='备注', default='无') Menus = models.ManyToManyField(Menu, through='OrderDetail') def __str__(self): return str(self.OrderId) def colored_status(self): if self.OrderState == '0': color_code = 'red' else: color_code = 'green' return format_html( '<span style="color: {};">{}</span>', color_code, self.OrderId, ) colored_status.short_description = '订单号' class Meta: verbose_name_plural = '订单' ordering = ["-Time"] class OrderDetail(models.Model): menu = models.ForeignKey(Menu, on_delete=models.CASCADE) order = models.ForeignKey(Order, on_delete=models.CASCADE) Number = models.IntegerField('数量', default=1) Price = models.DecimalField('单价快照', null=True, max_digits=5, decimal_places=2, default=0) def save(self, *args, **kwargs): self.Price = Menu.objects.get(Name=self.menu).Price super().save(*args, **kwargs) class Meta: verbose_name_plural = '订单详情' def __str__(self): return str(self.menu) class Expenses(models.Model): Name = models.CharField('备注', max_length=50, default="采购") Time = models.DateTimeField(verbose_name='时间') Price = models.DecimalField('金额', max_digits=10, decimal_places=2) class Meta: verbose_name_plural = '支出' ``` ###views.py 核心数据 ```python import json import time from django.http import HttpResponse from django.core import serializers from Cart import redis # Create your views here. from Data.models import Menu, MenuType, Order, Desk, User, OrderDetail import pickle def get_menu_type(request): data = MenuType.