练习随笔 - 电商平台

Posted 2021-12-02 derrickwilliams

models.py 

from django.db import models

class Shop(models.Model):
    name = models.CharField(max_length=20,verbose_name=‘店铺名称‘)
    username = models.CharField(max_length=20,verbose_name=‘登录账号‘)
    password = models.CharField(max_length=20,verbose_name=‘登录密码‘)

class Goods(models.Model):
    name = models.CharField(max_length=20,verbose_name=‘商品名称‘)
    price = models.DecimalField(max_digits=10,decimal_places=5,verbose_name=‘价格‘)
    img = models.ImageField(upload_to=‘upload‘,max_length=255,verbose_name=‘商品图片‘)
    shop = models.ForeignKey(Shop, on_delete=models.SET_NULL, null=True, blank=True)

# Create your models here.

admin.py

from django.contrib import admin
from . import models

admin.site.register(models.Shop)
admin.site.register(models.Goods)
# Register your models here.

views.py

from django.shortcuts import render,HttpResponse,redirect
from . import models
import os
from test2 import settings
def register(request): #注册
    if request.method == ‘GET‘:
        return render(request,‘register.html‘)
    if request.method == ‘POST‘:
        name = request.POST.get(‘name‘) #输入名称
        username = request.POST.get(‘username‘) #输入登录名
        password = request.POST.get(‘password‘) #输入登录密码
        re_pwd = request.POST.get(‘re_pwd‘) #重复提交密码
        if username and password and re_pwd: #判断是否获取到三个值
            if password == re_pwd: #如果两次输入密码一致
                user_obj = models.Shop.objects.filter(username=username).first() #查询用户名是否存在
                if user_obj: #如果已经存在
                    return HttpResponse(‘用户已存在‘)
                else: #如果都没有存在就将输入的存入数据库
                    models.Shop.objects.create(name=name,username=username,password=password).save()
                    return redirect(‘/login/‘) #返回
            else: #如果两次密码输入不一致
                return HttpResponse(‘两次密码不一致‘)
        else: #如果有空值
            return HttpResponse(‘不能有空！‘)


def login(request):
    #登录页面
    if request.method == ‘GET‘:
        return render(request, ‘login.html‘)
    if request.method == ‘POST‘:
        username = request.POST.get(‘username‘) #输入账号
        password = request.POST.get(‘password‘) #输入密码
        user_obj = models.Shop.objects.filter(username=username,password=password).first()#数据库匹配
        if user_obj: #判断是否有对应账户和密码是否匹配
            request.session[‘user_id‘]=user_obj.id #存session
            return redirect(‘/show/‘) #返回
        else: #如果账户和密码不匹配
            return HttpResponse(‘用户名或密码错误‘)

def index(request):

    shop = models.Shop.objects.all() #数据库查询
    good = models.Goods.objects.all()
    return render(request, ‘index.html‘, locals()) #把变量传到html中


def show(request):
    user_id = request.session.get(‘user_id‘) #取session
    shop = models.Shop.objects.all().filter(id=user_id) #通过session查询登录的
    good = models.Goods.objects.all().filter(shop_id=user_id).order_by(‘-price‘)
    context = {
        ‘shop‘ : shop, #teacher传到Html
        ‘good‘ : good
    }
    return render(request, ‘show.html‘, context)

def update(request):
    user_id = request.session.get(‘user_id‘) #取session
    shop = models.Shop.objects.all().filter(id=user_id) #通过session查询登录的
    good = models.Goods.objects.all().filter(shop_id=user_id).order_by(‘-price‘)
    context = {
        ‘shop‘ : shop, #teacher传到Html
        ‘good‘ : good
    }
    return render(request, ‘update.html‘, context)


def add(request):
    user_id = request.session.get(‘user_id‘) #取session
    if request.method == ‘GET‘:
        return render(request, ‘add.html‘)
    if request.method == ‘POST‘:
        name = request.POST.get(‘name‘)
        price = request.POST.get(‘price‘)
        img = request.FILES.get(‘img‘)
        f = open(os.path.join(settings.UPLOAD_ROOT, ‘‘, img.name), ‘wb‘)

        # 写文件 遍历图片文件流
        for chunk in img.chunks():
            f.write(chunk)
        # 关闭文件流
        f.close()
        if name and price and img:
            models.Goods.objects.create(name=name,price=price,img=img,shop_id=user_id)
        else:
            return HttpResponse(‘不能有空值‘)
    return redirect(‘/update/‘)


def delete(request,id): # 删除
    models.Goods.objects.filter(id=id).delete() # 通过session查询学生的id然后将主键关联删除
    return redirect(‘/update/‘)
# Create your views here.
HTML页面

add页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>添加商品页</h1>
<form method="post" enctype="multipart/form-data">
    {% csrf_token %}
    请输入商品名称：<input type="text" name="name"><br>
    请输入商品价格：<input type="text" name="price"><br>
    请选择商品图片：<input type="file" name="img" ><br>

    <button type="submit">上传</button>
</form>
</body>
</html>

index页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页展示</title>
</head>
<body>

{% for i in shop %}
{#    循环#}

   {{ i.name }}的店
{#    取姓名#}
<table border="1">

    <tr>
        <td>商品名称</td>
        <td>商品价格</td>
        <td>商品图片</td>
    </tr>
        {% for x in good %}
        {% if x.shop_id == i.id %}
    <tr>
        <td>{{ x.name }}</td>
        <td>{{ x.price }}</td>
        <td><img src="{{ x.img }}" ></td>

    </tr>
        {% endif %}
        {% endfor %}
</table>
{% endfor %}

</body>
</html>

login页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>login</title>
</head>
<body>
<h1>登陆界面</h1>
{#最简单的html代码#}
{#这里要提醒下，提交到后台的get，post方式都可以，但是作为账户数据的话，用post#}
<form action="/login/" method="post">
{#    form表单#}
    {% csrf_token %}
    用户名：<input type="text" name="username"><br>
    密码：<input type="password" name="password"><br>
    <input type="submit" value="登陆">
</form>
</body>
</html>

register页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>register</title>
</head>
<body>
    <h1>注册界面</h1>
    <form action="" method="post">
        {% csrf_token %}
        店铺名：<input type="text" name="name"><br>
        用户名：<input type="text" name="username"><br>
        密码：<input type="password" name="password"><br>
        确认密码：<input type="password" name="re_pwd"><br>
        <input type="submit" value="注册">
    </form>
</body>
</html>

show页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页展示</title>
</head>
<body>

{% for i in shop %}

    <h1>{{ i.name }}的店铺:<button><a href="/update/">管理店铺商品</a></button></h1>
    <h3>{{ i.name }}的店铺信息：</h3>
{% endfor %}

<table border="1">

    <tr>
        <td>商品名称</td>
        <td>商品价格</td>
        <td>商品图片</td>
    </tr>
{% for x in good %}
    <tr>
        <td>{{ x.name }}</td>
        <td>{{ x.price }}</td>
        <td><img src="/{{ x.img }}" ></td>
    </tr>
{% endfor %}
</table>



</body>
</html>

update页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


{% for i in shop %}

    <h1>{{ i.name }}的商品:</h1>
{% endfor %}
<a href="/add/">添加商品</a>
<table border="1">

    <tr>
        <td>商品名称</td>
        <td>商品价格</td>
        <td>商品图片</td>
        <td>删除</td>
    </tr>
{% for x in good %}
    <tr>
        <td>{{ x.name }}</td>
        <td>{{ x.price }}</td>
        <td><img src="/{{ x.img }}" ></td>
        <td><a href="/del/{{ x.id }}/">删除</a></td>
    </tr>
{% endfor %}
</table>


</body>
</html>