settings.py
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‘, ]
一般不用修改settings.py，但是使用模版需要修改如下：（即将TEMPLATES中的DIRS改成[os.path.join(BASE_DIR, ‘templates‘)]）
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‘, ], }, }, ]
urls.py
from django.urls import path from cookie import views urlpatterns = [ path(‘admin/‘, admin.site.urls), path(‘login/‘,views.login), path(‘index/‘,views.index), ]
models.py
from django.db import models # Create your models here. class User(models.Model): user=models.CharField(max_length=20,unique=True,db_index=True) pwd=models.CharField(max_length=20,db_index=True) def __str__(self): return self.user
views.py
from django.shortcuts import render, redirect
from .models import User
# Create your views here.
def login(request):
msg = ‘‘
if request.method == ‘POST‘:
name = request.POST.get("user")
pwd = request.POST.get("pwd")
c = User.objects.filter(user=name, pwd=pwd).count()
if c:
request.session[‘is_log‘] = 111
request.session[‘username‘] = name
return redirect(‘/index/‘)
else:
msg = ‘用户名或密码有误‘
return render(request, ‘login.html‘, {‘msg‘: msg})
else:
return render(request, ‘login.html‘, {‘msg‘: msg})
def index(request):
print(request.session.get(‘is_log‘))
if request.session.get(‘is_log‘, None):
user = request.session.get(‘username‘)
return render(request, ‘index.html‘, {‘user‘: user})
else:
return redirect(‘/login/‘)
def bb(request):
return redirect(‘/login/‘)
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>index</title> </head> <body> 欢迎 {{ user }}！ </body> </html>
login.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>login</title> </head> <body> <form action="/login/" method="post"> {% csrf_token %} <div> <laber for="user">用户名</laber> <input id="user" type="text" name="user"/> </div> <div> <laber for="pwd">密码</laber> <input id="pwd" type="password" name="pwd"> </div> <div> <input type="submit" value="登录"> </div> </form> </body> </html>
注意：由于我们将session存于数据库中所以要执行python manage.py makemigrations 后再执行python manage.py migrate创建数据表。