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django简单实现注册登录模块

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08/23
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源码下载：https://files.cnblogs.com/files/hardykay/login.zip

新建项目（我使用pycharm开发，也可以使用如下命令建立项目 ）

cmd命令行，前提需要安装django和配置系统环境变量，这里我就跳过了：django-admin startproject login项目建好后通过cd 进入到项目目录执行以下命令：python manage.py startapp app01

需求分析

一个登录注册系统基本包含哪些功能呢？

1、首页

2、登录/注册页面

3、验证登录信息

4、验证注册信息

5、注销模块

概要设计

数据库设计ER图

 

urls.py文件

urlpatterns = [
path('admin/', admin.site.urls),
path('index/', views.index),
path('registerView/', views.registerView),
path('register/', views.register),
path('login/', views.login),
path('accounts/login/', views.logout),
]

setting.py文件

# 开发阶段放置项目自己的静态文件
STATICFILES_DIRS = (
os.path.join(BASE_DIR, 'statics'),
)
# 执行collectstatic命令后会将项目中的静态文件收集到该目录下面来（所以不应该在该目录下面放置自己的一些静态文件，因为会覆盖掉）
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

数据库设计

1、models.py

from django.db import models# Create your models here.
class User(models.Model):
username = models.CharField(max_length=50)
email = models.CharField(max_length=60)
password = models.CharField(max_length=20) def __str__(self):
print(self.username)

2、建立数据库

# 1. 创建更改的文件
python manage.py makemigrations
# 2. 将生成的py文件应用到数据库
python manage.py migrate

views.py功能模块设计

from django.shortcuts import render,HttpResponseRedirect
from django.contrib import auth
from app01.myform import User as FUser
from app01.models import User
from django.contrib.auth.decorators import login_required
# Create your views here.def index(request):
user = request.session.get('user',False) return render(request,'app01/index.html',{'user':user})
#显示页面
def registerView(request):
user = request.session.get('user', False)
print(user)
if not user:
return render(request, 'app01/login.html')
else :
return HttpResponseRedirect('/index/')#注册
def register(request):
check = False
if request.method == 'POST':
form = FUser(request.POST)
if form.is_valid():
#print(form.cleaned_data)
user = User(**form.cleaned_data)
user.save()
check = True
return render(request, 'app01/immediate.html',{'check':check}) return HttpResponseRedirect('/index/')#登录
def login(request): user = request.POST['username']
password = request.POST['password']
result = User.objects.get(username=user,password=password) if not result:
return HttpResponseRedirect('/registerView/')
else :
request.session['user'] = user
return HttpResponseRedirect('/index/')#注销
def logout(request):
auth.logout(request)
return HttpResponseRedirect('/index/')

完整的views.py

首页模块设计（index函数）

def index(request):
user = request.session.get('user',False) return render(request,'app01/index.html',{'user':user})

后台代码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% if not user %}
<a href="/registerView/">注册/登录</a>
{% else %}
您已经登录<a href="/accounts/login/">注销</a>
{% endif %}
</body>
</html>

前台代码

前后台是一起的，这里用了两个系统提供的功能模块：1、user = request.session.get('user',False)。2、return render(request,'app01/index.html',{'user':user})

1的作用是去键为user的session值，如果不存在则返回False，2的作用是将变量的值写入到模板，第二个参数是模板路径，第三个参数是需要渲染的字典。

登录/注册显示页面

def registerView(request):
user = request.session.get('user', False)
print(user)
if not user:
return render(request, 'app01/login.html')
else :
return HttpResponseRedirect('/index/')

后台代码

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link href="/static/css/style.css" rel='stylesheet' type='text/css' />
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="application/x-javascript"> addEventListener("load", function() { setTimeout(hideURLbar, 0); }, false); function hideURLbar(){ window.scrollTo(0,1); } </script>
<!--webfonts-->
<!--//webfonts-->
</head>
<body>
<div class="main">
<div class="header" >
<h1>Login or Create a Free Account!</h1>
</div>
<p>Lorem iopsum dolor sit amit,consetetur sadipscing eliter,sed diam voluptua.At vero eso et accusam et justo duo dolores et ea rebum. </p>
<form action="/register/" method="POST">
<ul class="left-form">
<h2>New Account:</h2>
<li>
<input type="text" name="username" placeholder="Username" required/>
<a href="#" class="icon ticker"> </a>
<div class="clear"> </div>
</li>
{% csrf_token %}
<li>
<input type="text" name="email" placeholder="Email" required/>
<a href="#" class="icon ticker"> </a>
<div class="clear"> </div>
</li>
<li>
<input type="password" name="password" placeholder="password" required/>
<a href="#" class="icon into"> </a>
<div class="clear"> </div>
</li>
<li>
<input type="password" placeholder="password" required/>
<a href="#" class="icon into"> </a>
<div class="clear"> </div>
</li>
<label class="checkbox"><input type="checkbox" name="checkbox" checked=""><i> </i>Please inform me of upcoming w3layouts, Promotions and news</label>
<input type="submit" onClick="myFunction()" value="Create Account">
<div class="clear"> </div>
</ul>
</form>
<form action="/login/" method="post">
<ul class="right-form">
{% csrf_token %}
<h3>Login:</h3>
<div>
<li><input type="text" name="username" placeholder="Username" required/></li>
<li> <input type="password" name="password" placeholder="Password" required/></li>
<h4>I forgot my Password!</h4>
<input type="submit" onClick="myFunction()" value="Login" >
</div>
<div class="clear"> </div>
</ul>
<div class="clear"> </div> </form> </div>
<!-----start-copyright---->
<div class="copy-right">
<p>Template 2014. More Templates <a href="http://www.cssmoban.com/" target="_blank" title="模板之家">模板之家</a> - Collect from <a href="http://www.cssmoban.com/" title="网页模板" target="_blank">网页模板</a></p>
</div>
<!-----//end-copyright----></body>
</html>

前台代码

验证注册信息模块

1、建立form系统验证

from django import formsclass User(forms.Form):
username = forms.CharField(max_length=50)
email = forms.CharField(max_length=60)
password = forms.CharField(max_length=20)

myform.py

2、后台代码

def register(request):
check = False
if request.method == 'POST':
form = FUser(request.POST)
if form.is_valid():
#print(form.cleaned_data)
user = User(**form.cleaned_data)
user.save()
check = True
return render(request, 'app01/immediate.html',{'check':check}) return HttpResponseRedirect('/index/')

验证登录信息模块

def login(request): user = request.POST['username']
password = request.POST['password']
result = User.objects.get(username=user,password=password) if not result:
return HttpResponseRedirect('/registerView/')
else :
request.session['user'] = user
return HttpResponseRedirect('/index/')

注销

def logout(request):
auth.logout(request)
return HttpResponseRedirect('/index/')