天天生鲜 - App设计

天天生鲜-思路数据库设计

天天生鲜-各个App

全文检索

天天生鲜-静态文件

一、项目目录

daily_fresh_demo　　- daily_fresh_demo　　- df_cart # 购物车功能　　- df_goods # 商品功能　　- df_order # 订单功能　　- df_user # 用户功能（包括登录验证等相关功能）　　- static # 静态文件　　- templates # 前段模板-　　 whoosh_index # 全局索引文件　　db.sqlite3　　manage.py

 注：这个电商网站是博主在接触Django之后做的第一个项目，还有很多地方需要改进。如果有需要项目相关视频资源的朋友可以博客园私信，或者评论区留言，博主会在看到的第一时间分享。
附github源码地址（包含静态文件）：https://github.com/weilanhanf/daily_fresh_demo

daily_fresh_demo
    - daily_fresh_demo
        - settings.py
        - urls.py
        - wsgi.py
        - __init__.py  # 这里使用Django自带的小型sqlite数据库，如果使用mysql就需要在这里添加相应的驱动

1、全局配置文件settings.py

 import os

 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/

 # SECURITY WARNING: keep the secret key used in production secret!
 SECRET_KEY = 'uey!i4x26n!$d-73cs%blri)09#xfud_e361ne2h(#s27)l!'

 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True

 ALLOWED_HOSTS = []

 # Application definition

 INSTALLED_APPS = [
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'df_user',
     'df_goods',
     'df_cart',
     'df_order',
     'tinymce',#使用富文本编辑框要在settings文件中安装
     'haystack',#全文检索
 ]

 MIDDLEWARE = [
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 ]

 ROOT_URLCONF = 'daily_fresh_demo.urls'

 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'DIRS': [os.path.join(BASE_DIR, 'templates')]
         ,
         'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [
                 'django.template.context_processors.debug',
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
             ],
         },
     },
 ]

 WSGI_APPLICATION = 'daily_fresh_demo.wsgi.application'

 # Database
 # https://docs.djangoproject.com/en/2.0/ref/settings/#databases

 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
         'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
     },
     'OPTIONS':{
         'TIMEOUT': 20,
     }
 }

 # Password validation
 # https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators

 AUTH_PASSWORD_VALIDATORS = [
     {
         'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
     },
     {
         'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
     },
     {
         'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
     },
     {
         'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
     },
 ]

 # Internationalization
 # https://docs.djangoproject.com/en/2.0/topics/i18n/

 LANGUAGE_CODE = 'en-us'

 TIME_ZONE = 'UTC'

 USE_I18N = True

 USE_L10N = True

 USE_TZ = True

 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/2.0/howto/static-files/

 STATIC_URL = '/static/'
 STATICFILES_DIRS = [
     os.path.join(BASE_DIR, 'static'),
 ]

 #开发阶段上传文件目录
 MEDIA_ROOT = os.path.join(BASE_DIR, 'static')
 #部署后的上传文件目录
 # MEDIA_ROOT = 'var/www/daily_fresh_demo/static'

 #富文本编辑框的使用配置
 TINYMCE_DEFAULT_CONFIG = {
     'theme': 'advanced',
     'width': 600,
     'height': 400,
 }

 HAYSTACK_CONNECTIONS = {
     'default':{
         #使用whoosh引擎
         'ENGINE':'haystack.backends.whoosh_cn_backend.WhooshEngine',
         #添加索引文件路径
         'PATH':os.path.join(BASE_DIR, 'whoosh_index'),
     }
 }
 #当修改删除数据时，自动生成索引
 HAYSTACK_SIGNAL_PROCESSOR ='haystack.signals.RealtimeSignalProcessor'
 # HAYSTACK_DEFAULT_OPERATOR = 'OR'
 HAYSTACK_SEARCH_RESULTS_PER_PAGE = 18#每一页显示多少数据

2、路由分发urls.py

from django.contrib import admin
from django.urls import path
from django.conf.urls import url, include

urlpatterns = [
    path('admin/', admin.site.urls),
    url(r'^', include('df_goods.urls',namespace='goods')),
    url(r'^user/', include('df_user.urls', namespace='user')),
    url(r'^goods/', include('df_goods.urls')),
    url(r'^cart/',include('df_cart.urls', namespace='cart')),
    url(r'^order/',include('df_order.urls', namespace='order')),
    url(r'^search/', include('haystack.urls')),#全文检索
    url(r'^tinymce/', include('tinymce.urls')),#使用富文本编辑框配置confurl
]

二、用户相关功能模块

app目录如下

df_user
    - migrations # 迁移文件目录
    - admin.py
    - apps.py
    - models.py
    - test.py
    - urls.py
    - user_docorator.py  # 这里使用装饰器做用户身份认证
    - views.py
    - __init__.py

1、apps.py

from django.apps import AppConfig

class DfUserConfig(AppConfig):
    name = 'df_user'

2、models.py

from django.db import models
# Create your models here.

class UserInfo(models.Model):
    uname=models.CharField(max_length=20)
    upwd=models.CharField(max_length=40)
    uemail=models.CharField(max_length=30)
    ushou=models.CharField(max_length=20,default="")
    uaddress=models.CharField(max_length=100,default="")
    uyoubian=models.CharField(max_length=6,default="")
    uphone=models.CharField(max_length=11,default="")
    # default,blank是python层面的约束，不影响数据库表结构，修改时不需要迁移 python manage.py makemigrations

class GoodsBrowser(models.Model):
    user=models.ForeignKey('UserInfo', on_delete=models.CASCADE)
    good=models.ForeignKey('df_goods.GoodsInfo', on_delete=models.CASCADE)

3、urls.py

#!/user/bin/env python
# -*- coding: utf-8 -*-
from django.conf.urls import url
from . import views

app_name = 'df_user'

urlpatterns = [
    url(r'^register/$', views.register),
    url(r'^register_handle/$', views.register_handle),
    url(r'^register_exist/$', views.register_exist),
    url(r'^login/$', views.login),
    url(r'^login_handle/$', views.login_handle),
    url(r'^info/$', views.info),
    url(r'^order/(\d+)$', views.order),
    url(r'^site/$', views.site),
    # url(r'^place_order/$', views.place_order),
    url(r'^logout/$', views.logout)
]

4、view.py

from django.shortcuts import render, redirect, HttpResponseRedirect, HttpResponse
from django.http import JsonResponse
from .models import UserInfo
from df_goods.models import GoodsInfo
from df_user.models import GoodsBrowser
from df_order.models import *
from hashlib import sha1
from . import user_decorator
from django.core.paginator import Paginator,Page

def register(request):
    context={
        'title':'用户注册',
    }
    return render(request, 'df_user/register.html', context)

def register_handle(request):
    #接受用户输入
    post = request.POST
    print(request.method)
    uname=post.get('user_name')
    upwd=post.get('pwd')
    upwd2=post.get('cpwd')
    uemail=post.get('email')

    #判断两次密码一致性
    if upwd != upwd2:
        return redirect('/user/register/')
    #密码加密
    s1=sha1()
    s1.update(upwd.encode('utf8'))
    upwd3=s1.hexdigest()
    # sha = hashlib.sha1(upwd.encode('utf8'))
    # sha.hexdigest()

    #创建对象
    user=UserInfo()
    user.uname=uname
    user.upwd=upwd3
    user.uemail=uemail
    user.save()
    print(uname, upwd3,uemail)
    #注册成功
    context = {
        'title': '用户登陆',
        'uname': uname,
    }
    # return redirect('/user/login/')
    return render(request, 'df_user/login.html', context)

def register_exist(request):
    uname=request.GET.get('uname')
    count=UserInfo.objects.filter(uname=uname).count()
    if count == 0:
        print('当前用户名可用')
    return JsonResponse({'count':count})

# @user_decorator.request_detail
def login(request):
    print(request.get_full_path(), 'request.get_full_path')
    uname=request.COOKIES.get('uname', '')
    context={
        'title': '用户登陆',
        'error_name':0,
        'error_pwd':0,
        'uname':uname,
    }
    return render(request, 'df_user/login.html', context)

def login_handle(request):#没有利用ajax提交表单
    #接受请求信息
    post = request.POST
    uname = post.get('username')
    upwd = post.get('pwd')
    jizhu = post.get('jizhu', 0)
    #根据用户名查询对象
    # print(uname, upwd, jizhu, request.method)
    users = UserInfo.objects.filter(uname=uname)#[]
    print(uname,len(users), users)

    #判断如果未查到则用户名错误，如果查到则判断密码是否正确，正确则转到用户中心
    if len(users)==1:
        s1 = sha1()
        s1.update(upwd.encode('utf8'))
        if s1.hexdigest()==users[0].upwd:
            print("验证成功")
            # request.COOKIES['url'] = '/8/'
            url = request.COOKIES.get('url','/')
            print(url)
            red = HttpResponseRedirect(url)#继承与HttpResponse 在跳转的同时 设置一个cookie值
            #是否勾选记住用户名，设置cookie
            if jizhu!=0:
                red.set_cookie('uname', uname)
                # print('设置cookie', request.COOKIES['uname'])
            else:
                red.set_cookie('uname', '',max_age=-1)#设置过期cookie时间，立刻过期
            request.session['user_id'] = users[0].id
            request.session['user_name'] = uname
            return red
        else:
            context = {
                'title':'用户名登陆',
                'error_name': 0,
                'error_pwd':1,
                'uname':uname,
                'upwd':upwd,
            }
            # print('密码错误')
            return render(request, 'df_user/login.html', context)
    else:
        context = {
            'title': '用户名登陆',
            'error_name': 1,
            'error_pwd': 0,
            'uname': uname,
            'upwd': upwd,
        }
        print('不存在当前用户')
        return render(request, 'df_user/login.html', context)

def logout(request):
    request.session.flush()#清空当前用户所有session
    return redirect('/')

@user_decorator.login
def info(request):
    username =request.session.get('user_name')
    # print(username)
    user = UserInfo.objects.filter(uname = username).first()
    # user = UserInfo.objects.get(id=request.session['user_id'])
    # print(request.session['user_name'])

    #列表形式最近浏览
    # goods_ids = request.COOKIES.get('goods_ids', '')
    # print('cookies', goods_ids)
    #在cookie中goods_id以{ 'gooids':'1,5,6,7,8,9'}形式存入
    # goods_ids1 = goods_ids.split(',')#拆分为列表
    # print('最近浏览商品序号',goods_ids1)
    # goods_list1 = GoodsInfo.objects.filter(id__in=goods_ids1)#会破坏浏览商品的先后顺序
    # if goods_ids1[0] != '' :
    #     goods_list = [GoodsInfo.objects.get(id=int(goods_id)) for goods_id in goods_ids1]
    #     # for goods_id in goods_ids1:
    #     #     goods_list.append(GoodsInfo.objects.get(id=int(goods_id)))#pk与id区别
    #     # 每次只查询一个商品并放入列表的最后，保证了浏览商品的顺序
    #     explain = '最近浏览'
    # else:
    #     goods_list = []
    #     explain = '无最近浏览'

    # 最近浏览计入第三张那个表
    goods_ids = GoodsBrowser.objects.filter(user_id=request.session['user_id'])
    # print(goods_ids)
    goods_ids1 = [good_browser.good_id for good_browser in goods_ids]
    # print(goods_ids1)
    # goods_ids2 = []
    # for good_id in goods_ids1:
    #     if good_id not in goods_ids2:
    #         goods_ids2.append(good_id)
    # print(goods_ids2)

    if len(goods_ids1) != 0:
        goods_list = [GoodsInfo.objects.get(id=goods_id) for goods_id in goods_ids1]
        goods_list.reverse()
        # print(goods_list)
        explain = '最近浏览'
    else:
        goods_list = []
        explain = '无最近浏览'

    context={
        'title':'用户中心',
        'page_name': 1,
        'user_phone':user.uphone,
        'user_address':user.uaddress,
        'user_name':request.session['user_name'],
        'goods_list': goods_list,
        'explain': explain,
    }
        # print(user.uname, user.uaddress, user.uphone)
    return render(request, 'df_user/user_center_info.html', context)

@user_decorator.login
def order(request, index):
    user_id = request.session['user_id']
    orders_list = OrderInfo.objects.filter(user_id=int(user_id)).order_by('-odate')
    # print(len(orders_list))
    # print(orders_list)
    paginator = Paginator(orders_list,2)
    page = paginator.page(int(index))
    context={
        'paginator': paginator,
        'page':page,
        # 'orders_list':orders_list,
        'title':"用户中心",
        'page_name':1,
    }
    return render(request, 'df_user/user_center_order.html', context)

@user_decorator.login
def site(request):
    user = UserInfo.objects.get(id=request.session['user_id'])
    # print(user, type(user), user.uphone,user.uaddress)

    if request.method=="POST":
        post = request.POST
        user.ushou = post.get('ushou')
        user.uaddress = post.get('uaddress')
        user.uyoubian = post.get('uyoubian')
        user.uphone = post.get('uphone')
        user.save()
    context = {
        'page_name': 1,
        'title': '用户中心',
        'user':user,
    }
    return render(request, 'df_user/user_center_site.html', context)

5、user_decorator.py

对用户进行身份认证，如用户进入个人中心的时候需要验证，购买商品也需要身份验证

#!/user/bin/env python
# -*- coding: utf-8 -*-
from django.http import HttpResponseRedirect
import re

#如果未登录则转到登陆页面
def login(func):
    def login_fun(request, *args, **kwargs):
        if 'user_id' in request.session:
            return func(request, *args, **kwargs)
        else:
            red = HttpResponseRedirect('/user/login/')
            red.set_cookie('url', request.get_full_path())
            print(request.get_full_path(), 'user_decorator')
            #保证用户再登陆验证之后仍点击到希望的页面
            return red
    return login_fun

"""
http://127.0.0.1:8000/200/?type=10
request.path :表示当前路径，为/200/
request.get_full_path():表示完整路径，为/200/?type=10
"""

三、商品相关功能模块

app目录如下

df_goods
    - migrations
    - admin.py
    - apps.py
    - models.py
    - search_indexes.py  # 搜索商品功能
    - tests.py
    - urls.py
    - views.py
    - __init__.py

1、app.py

from django.apps import AppConfig

class DfGoodsConfig(AppConfig):
    name = 'df_goods'

2、models.py

from django.db import models
from tinymce.models import HTMLField#使用富文本编辑框要在settings文件中安装
#将一对多的关系维护在GoodsInfo中维护，另外商品信息与分类信息都属于重要信息需要使用逻辑删除

# Create your models here.
class TypeInfo(models.Model):#商品分类信息  水果 海鲜等
    isDelete = models.BooleanField(default=False)#逻辑删除
    ttitle = models.CharField(max_length=20)
    def __str__(self):#这里定义在admin中要显示的内容
        # return self.ttitle.encode('utf-8')
        return self.ttitle

class GoodsInfo(models.Model):#具体商品信息
    isDelete = models.BooleanField(default=False)#逻辑删除
    gtitle = models.CharField(max_length=20)#商品的名称
    gpic = models.ImageField(upload_to='df_goods')#关联图片目录
    gprice = models.DecimalField(max_digits=5, decimal_places=2)#商品价格小数位为两位，整数位为3位
    gunit = models.CharField(max_length=20, default='500g')#商品单位kg或者个数
    gclick = models.IntegerField()#商品点击量
    gjianjie = models.CharField(max_length=200)#商品简介
    gkucun = models.IntegerField()#商品库存
    gcontent = HTMLField()#商品介绍
    gtype = models.ForeignKey(TypeInfo, on_delete=models.CASCADE)#外键关联TypeInfo表
    # gadv = models.BooleanField(default=False)#商品是否推荐
    def __str__(self):
        # return self.gtitle.encode('utf-8')
        return self.gtitle

# python3中 __str__ 不能接收bytes类型的数据，这和python2/3的编解码方式是有关系的。

3、urls.py

#!/user/bin/env python
# -*- coding: utf-8 -*-

from django.conf.urls import url
from . import views
from .views import *

app_name = 'df_goods'

urlpatterns = [
    url('^$', views.index),
    url('^list(\d+)_(\d+)_(\d+)/$', views.list),
    url('^(\d+)/$', views.detail),
    url(r'^search/', MySearchView()),#全文检索
    url(r'^cookieTest/', views.cookieTest)

]

4、view.py

from django.shortcuts import render, HttpResponse
from .models import *
from django.core.paginator import Page, Paginator
from df_cart.models import CartInfo
from df_user.models import GoodsBrowser
from haystack.views import SearchView

# Create your views here.
def index(request):
    #查询各个分类的最新4条，最热4条数据
    typelist = TypeInfo.objects.all()
    print(len(typelist), 'asdf')
    # 连表操作（了不起的双下划线）利用双下划线和 _set将表之间的操作连接起来
    type0 = typelist[0].goodsinfo_set.order_by('-id')[0:4]#按照最新上传的水果显示
    type01 = typelist[0].goodsinfo_set.order_by('-gclick')[0:4]#按照用户点击量上传
    type1 = typelist[1].goodsinfo_set.order_by('-id')[0:4]
    type11 = typelist[1].goodsinfo_set.order_by('-gclick')[0:4]
    type2 = typelist[2].goodsinfo_set.order_by('-id')[0:4]
    type21 = typelist[2].goodsinfo_set.order_by('-gclick')[0:4]
    type3 = typelist[3].goodsinfo_set.order_by('-id')[0:4]
    type31 = typelist[3].goodsinfo_set.order_by('-gclick')[0:4]
    type4 = typelist[4].goodsinfo_set.order_by('-id')[0:4]
    type41 = typelist[4].goodsinfo_set.order_by('-gclick')[0:4]
    type5 = typelist[5].goodsinfo_set.order_by('-id')[0:4]
    type51 = typelist[5].goodsinfo_set.order_by('-gclick')[0:4]

    #判断是否存在登录状态
    try:
        user_id = request.session['user_id']
        cart_count = CartInfo.objects.filter(user_id=int(user_id)).count
    except:
        cart_count = 0
    context = {
        'title': '首页',
        'cart_count': cart_count,
        'guest_cart':1,
        'type0':type0, 'type01':type01,
        'type1':type1, 'type11':type11,
        'type2':type2, 'type21':type21,
        'type3':type3, 'type31':type31,
        'type4':type4, 'type41':type41,
        'type5':type5, 'type51':type51,
    }
    """

    context = {
        'guest_cart':1,
        'title': '首页'
    }

    #获取最新的4个商品
    hot = GoodsInfo.objects.all().order_by('-gclick')[0:4]
    context.setdefault('hot', hot)

    #*******获取各分类下的点击商品*******
    #首先获取分类
    typelist = TypeInfo.objects.all()
    for i in range(len(typelist)):
    #获取type对象
        type = typelist[i]
        #根据type对象获取商品列表
        #通过外键关联获取商品
        #获取对应列表中的通过id倒序排列的前四个
        goods1 = type.goodinfo_set.order_by('-id')[0:4]
        goods2 = type.goodinfo_set.order_by('-gclick')[0:4]
        key1 = 'type' + str(i)  # 根据id 倒叙排列
        key2 = 'type' + str(i) + str(i)  # 根据点击量倒序排列
        context.setdefault(key1, goods1)
        context.setdefault(key2, goods2)

    print(context)
    """

    # print(type0, type01)
    # for i in type0:
    #     print(i.gpic)
    return render(request, 'df_goods/index.html', context)

def list(request, tid, pindex, sort):
    #tid：商品种类信息  pindex：商品页码 sort：商品显示分类方式
    typeinfo = TypeInfo.objects.get(pk=int(tid))
    #根据主键查找当前的商品分类  海鲜或者水果
    news = typeinfo.goodsinfo_set.order_by('-id')[0:2]
    #list.html左侧最新商品推荐
    goods_list = []
    # list中间栏商品显示方式
    ':#默认最新
        goods_list = GoodsInfo.objects.filter(gtype_id=int(tid)).order_by('-id')
    ':#按照价格
        goods_list = GoodsInfo.objects.filter(gtype_id=int(tid)).order_by('-gprice')
    ':#按照人气点击量
        goods_list = GoodsInfo.objects.filter(gtype_id=int(tid)).order_by('-gclick')

    #创建Paginator一个分页对象
    paginator = Paginator(goods_list, 4)
    #返回Page对象，包含商品信息
    page = paginator.page(int(pindex))
    context = {
        'title': '商品列表',
        'guest_cart': 1,
        'page': page,
        'paginator': paginator,
        'typeinfo': typeinfo,
        'sort': sort,  # 排序方式
        'news': news,
    }
    return render(request,'df_goods/list.html',context)

def detail(request, id):
    goods = GoodsInfo.objects.get(pk=int(id))
    goods.gclick = goods.gclick+1#商品点击量
    goods.save()

    news = goods.gtype.goodsinfo_set.order_by('-id')[0:2]
    context = {
        'title': goods.gtype.ttitle,
        'guest_cart': 1,
        'goods': goods,
        'news': news,
        'id':id,
    }
    response=render(request, 'df_goods/detail.html', context)

    #使用列表   记录最近浏览， 在用户中心使用
    # goods_ids = request.COOKIES.get('goods_ids', '')#在cookie中建立一个商品id的对应最近浏览的商品
    # goods_id = '%d' %goods.id#将url转化为整型
    # if goods_ids != '':#判断是否存在浏览记录，如果存在则继续判断，
    #     goods_ids1 = goods_ids.split(',')#拆分为列表
    #     if goods_ids1.count(goods_id)>=1:#如果商品已经存在记录则删除旧纪录
    #         goods_ids1.remove(goods_id)
    #     goods_ids1.insert(0, goods_id)#将商品插入到第一页
    #     if len(goods_ids1)>=6:#每页只显示五个最近浏览的商品
    #         del goods_ids1[5]
    #     goods_ids = ','.join(goods_ids1)#将商品id拼接为字符串
    # else:
    #     goods_ids = goods_id#显然第一次查看detail页面时为空，则直接添加
    # response.set_cookie('goods_ids', goods_ids)#写入cookie

    # 将用户最近浏览商品记录进第三张表
    '''
    1,判断是否有用户登录， 如果没有直接结束
        2,判断在当前浏览表中是否存在这个用户，
            不存在则创建一个用户浏览记录，并且不用判断是否浏览过
            若存在则判断当前用户是否存在一个浏览过当前商品
                3，不管有没有浏览过当前商品都要先创建一个商品记录放入表中
                    如果浏览过则删除前期浏览的商品
                    若没有则不用删除
                    4，如果商品记录为五条，则将最后的一条删除

    '''
    try:
        user_id = request.session['user_id']
        # user_list = GoodsBrowser.objects.filter(user_id=int(user_id))
        goods_browser = GoodsBrowser()
        goods_browser.user_id = int(user_id)
        goods_browser.good_id = int(id)
        goods_browser.save()
        old_user_list = GoodsBrowser.objects.filter(user_id=int(user_id), good_id=int(id))
        if len(old_user_list) > 1:
            GoodsBrowser.objects.filter(good_id=int(id)).first().delete()
        if len(GoodsBrowser.objects.filter(user_id=int(user_id))) > 5:
            GoodsBrowser.objects.filter(user_id=int(user_id)).first().delete()
    except:
        pass
    return response

def cart_count(request):
    if request.session.has_key('user_id'):
        return CartInfo.objects.filter(user_id=request.session['user_id']).count
    else:
        return 0

class MySearchView(SearchView):
    def extra_context(self):
        context = super(MySearchView, self).extra_context()
        context['title'] = '搜索'
        context['guest_cart'] = 1
        context['cart_count'] = cart_count(self.request)
        return context

def cookieTest(request):
    response = HttpResponse()
    if request.COOKIES.get('binggan'):#判断是否有此cookie
        cookie = request.COOKIES
        response.write(cookie['binggan'])#如果有则写入
    return response

5、admin.py

from django.contrib import admin
from .models import TypeInfo,GoodsInfo

# Register your models here.
#注册模型类  普通方法
class TypeInfoAdmin(admin.ModelAdmin):
    list_display = ['id', 'ttitle']

# class GoodsInfoAdmin(admin.ModelAdmin):
#     list_per_page = 15
#     list_display = ['id', 'gtitle', 'gunit','gclick', 'gprice','gpic','gjianjie','gkucun','gcontent','gjianjie']

admin.site.register(TypeInfo, TypeInfoAdmin)
# admin.site.register(GoodsInfo, GoodsInfoAdmin)

# 装饰器方法
@admin.register(GoodsInfo)
class GoodsInfoAdmin(admin.ModelAdmin):
    list_per_page = 15
    list_display = ['id', 'gtitle', 'gunit','gclick', 'gprice','gpic','gjianjie','gkucun','gcontent','gjianjie']

6、search_indexes.py

#!/user/bin/env python
# -*- coding: utf-8 -*-
from haystack import indexes
from .models import *

#制定对于某个类的某些数据建立索引
class GoodsInfoIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)

    def get_model(self):#对GoodsInfo模型类进行索引
        return GoodsInfo

    def index_queryset(self, using=None):
        return self.get_model().objects.all()

全局索引提供一个大的全局搜索功能，也可以通过Django 中的ORM的Q查询实现
这里请参考全局索引：https://www.cnblogs.com/welan/p/9231430.html

四、订单相关功能

app目录如下

df_order
    - migrations
    - admin.py
    - apps.py
    - models.py
    - tests.py
    - urls.py
    - views.py
    - __init__.py

1、app.py

from django.apps import AppConfig

class DfOrderConfig(AppConfig):
    name = 'df_order'

2、models.py

from django.db import models

# Create your models here.
class OrderInfo(models.Model):#大订单
    oid = models.CharField(max_length=20, primary_key=True)#订单号
    user = models.ForeignKey('df_user.UserInfo', on_delete=models.CASCADE)#确定哪个用户的订单
    odate = models.DateTimeField(auto_now=True)
    oIsPay = models.BooleanField(default=False)#当前订单是否支付，默认为否
    ototal = models.DecimalField(max_digits=8, decimal_places=2)
    oaddress = models.CharField(max_length=150)
    #虽然订单总价可以由多个商品的单价以及数量求得，但是由于用户订单的总价的大量使用，忽略total的冗余度

#无法实现：真实支付，物流信息

class OrderDetailInfo(models.Model):#大订单中的具体某一商品订单
    goods = models.ForeignKey('df_goods.GoodsInfo',on_delete=models.CASCADE)#关联商品信息
    order = models.ForeignKey('OrderInfo', on_delete=models.CASCADE)#关联大订单，确定属于某一个大订单中
    price = models.DecimalField(max_digits=6, decimal_places=2)#某一类商品订单的价格最高达9999.99
    count = models.IntegerField()

3、urls.py

#!/user/bin/env python
# -*- coding: utf-8 -*-
from django.conf.urls import url
from . import views

app_name = 'df_order'

urlpatterns = [
    url(r'^$', views.order),
    url(r'^push/$', views.order_handle),
]

4、view.py

from django.shortcuts import render,HttpResponse,redirect
from df_user import user_decorator
from django.db import transaction
from django.http import JsonResponse
from datetime import datetime
from decimal import Decimal
from .models import *
from df_cart.models import  CartInfo
from df_user.models import UserInfo
# Create your views here.

@user_decorator.login
def order(request):
    uid = request.session['user_id']
    user = UserInfo.objects.get(id=uid)
    cart_ids = request.GET.getlist('cart_id')
    carts = []
    total_price = 0
    for goods_id in cart_ids:
        cart = CartInfo.objects.get(id = goods_id)
        carts.append(cart)
        total_price = total_price + float(cart.count) * float(cart.goods.gprice)

    total_price = float('%0.2f'%total_price)
    trans_cost = 10#运费
    total_trans_price = trans_cost + total_price
    # print(total_trans_price)
    # import datetime订单提交时间
    # value = datetime.datetime.now()
    # print(value)
    context = {
        'title': '提交订单',
        'page_name': 1,
        'user':user,
        'carts': carts,
        'total_price':float('%0.2f'%total_price),
        'trans_cost': trans_cost,
        'total_trans_price': total_trans_price,
        # 'value':value
    }
    return render(request, 'df_order/place_order.html', context)

'''
事务提交：
这些步骤中，任何一环节一旦出错则全部退回1
1. 创建订单对象
2. 判断商品库存是否充足
3. 创建 订单 详情 ，多个
4，修改商品库存
5. 删除购物车
'''

@user_decorator.login
@transaction.atomic()#事务
def order_handle(request):
    tran_id = transaction.savepoint()#保存事务发生点
    cart_ids = request.POST.get('cart_ids')#用户提交的订单购物车，此时cart_ids为字符串，例如'1,2,3,'
    # print('订单购物车', cart_ids)
    user_id = request.session['user_id']#获取当前用户的id
    # print('当前用户', user_id)
    try:
        order_info = OrderInfo()#创建一个订单对象
        now = datetime.now()
        order_info.oid = '%s%d'%(now.strftime('%Y%m%d%H%M%S'), user_id)#订单号为订单提交时间和用户id的拼接
        order_info.odate = now#订单时间
        # print('订单时间', now)
        order_info.user_id = int(user_id)#订单的用户id
        order_info.ototal = Decimal(request.POST.get('total'))#从前端获取的订单总价
        # print('总价', order_info.ototal)
        order_info.save()#保存订单

        for cart_id in cart_ids.split(','):#逐个对用户提交订单中的每类商品即每一个小购物车
            cart = CartInfo.objects.get(pk = cart_id)#从CartInfo表中获取小购物车对象
            order_detail = OrderDetailInfo()#大订单中的每一个小商品订单
            order_detail.order = order_info#外键关联，小订单与大订单绑定
            goods = cart.goods#具体商品
            if cart.count <= goods.gkucun:#判断库存是否满足订单，如果满足，修改数据库
                goods.gkucun = goods.gkucun - cart.count
                goods.save()
                # print(goods.gtitle,'库存', goods.gkucun)
                order_detail.goods = goods
                order_detail.price = goods.gprice
                # print('小订单价格',order_detail.price)
                order_detail.count = cart.count
                # print('小订单商品数量', order_detail.count)
                order_detail.save()
                cart.delete()#并删除当前购物车
            else:#否则，则事务回滚，订单取消
                transaction.savepoint_rollback(tran_id)
                return HttpResponse('库存不足')
                # return redirect('/cart/')
        data = {
            'ok': 1,
        }
        transaction.savepoint_commit(tran_id)
    except Exception as e:
        print("%s"%e)
        print('未完成订单提交')
        transaction.savepoint_rollback(tran_id)#事务任何一个环节出错，则事务全部取消
    # return HttpResponse('订单提交成功')
    return JsonResponse(data)

@user_decorator.login
def pay(request):
    pass

五、购物车相关模块功能

app目录如下

df_cart
    - migrations
    - admin.py
    - apps.py
    - models.py
    - test.py
    - urls.py
    - views.py
    - __init__.py

1、app.py

from django.apps import AppConfig

class DfCartConfig(AppConfig):
    name = 'df_cart'

2、models.py

from django.db import models

# Create your models here.
#当一对多关系时例如生鲜分类对生鲜具体商品， 将关系维护在多的那张表中，即在具体商品表中维护
#当多对多关系，则新建一张表，在再第三张表中维护表关系
#用户表与商品表则将关系维护在购物车表中

#在购物车的逻辑删除与物理删除  选择物理删除，
#购物车中的商品不属于重要的信息，可以直接删除

class CartInfo(models.Model):
    user = models.ForeignKey('df_user.UserInfo', on_delete=models.CASCADE)
    goods = models.ForeignKey('df_goods.GoodsInfo', on_delete=models.CASCADE)
    #在同级工程目录下引用外键
    count = models.IntegerField()#记录用户买个多少单位的商品

3、urls.py

#!/user/bin/env python
# -*- coding: utf-8 -*-
from django.conf.urls import url
from . import views

app_name = 'df_cart'

urlpatterns = [
    url(r'^$', views.cart),
    url(r'^add(\d+)_(\d+)/$', views.add),
    url(r'^edit(\d+)_(\d+)/$', views.edit),
    url(r'^delete(\d+)/$', views.delete),
]

4、view.py

from django.shortcuts import render,redirect
from django.http import JsonResponse
from df_user import user_decorator
from .models import *
# Create your views here.

@user_decorator.login
def cart(request):
    uid = request.session['user_id']
    carts = CartInfo.objects.filter(user_id=uid)
    context = {
        'title':'购物车',
        'page_name':1,
        'carts':carts
    }
    if request.is_ajax():
        count = CartInfo.objects.filter(user_id=request.session['user_id']).count()
        #求当前用户购买了几件商品
        return JsonResponse({'count': count})
    else:
        return render(request, 'df_cart/cart.html', context)

@user_decorator.login
def add(request, gid, count):
    uid = request.session['user_id']
    gid = int(gid)
    count = int(count)
    print(gid, count)
    #查询购物车中是否已经有此商品，如果有则数量增加，如果没有则新增
    carts = CartInfo.objects.filter(user_id=uid, goods_id=gid)
    if len(carts)>=1:
        cart = carts[0]
        cart.count = cart.count + count
    else:
        cart = CartInfo()
        cart.user_id = uid
        cart.goods_id = gid
        cart.count = count
    cart.save()
    #如果是ajax提交则直接返回json，否则转向购物车
    if request.is_ajax():
        count = CartInfo.objects.filter(user_id=request.session['user_id']).count()
        #求当前用户购买了几件商品
        return JsonResponse({'count': count})
    else:
        return redirect('/cart/')

@user_decorator.login
def edit(request, cart_id, count):
    try:
        cart = CartInfo.objects.get(pk=int(cart_id))
        cart.count=int(count)
        cart.save()
        data = {'count':0}
    except Exception as e:
        data = {'count':count}
    return JsonResponse(data)

@user_decorator.login
def delete(request,cart_id):
    print(cart_id)
    try:
        cart = CartInfo.objects.get(pk=int(cart_id))
        cart.delete()
        data={'ok':1}
        print('数据库修改成功')
    except Exception as e:
        data = {'ok':0}
    return JsonResponse(data)