django从零开始-视图

1.处理的登录请求

views文章中添加登录函数login_action

def login_action(request):
    if request.method == 'POST':
        username = request.POST.get('username','')
        password = request.POST.get('password', '')
        if username == 'admin' and password == 'admin':
            return HttpResponse('登录成功')
        else:
            return  render(request,'index.html',{'error':'用户名或者密码错误'})

添加url路由

 url(r'^login_action$',views.login_action),

2.登录成功页面

创建event_manage.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>发布会管理</title>
</head>
<body>
<h1>
    <center>登录成功</center>
</h1>
</body>
</html>

改写views.py的登录函数，返回一个页面

def login_action(request):
    if request.method == 'POST':
        username = request.POST.get('username','')
        password = request.POST.get('password', '')
        if username == 'admin' and password == 'admin':
            return  HttpResponseRedirect('/event_manage/')
            #return render(request,'event_manage.html')#BUILD2
            #return HttpResponse('登录成功')
        else:
            return  render(request,'index.html',{'error':'用户名或者密码错误'})


def event_manage(request):
    return render(request,'event_manage.html')

改下url路由

  url(r'^event_manage/$',views.event_manage),

3.cookie and seeion

在这里我们使用seeion

更改试图函数
编辑html文件接受session
数据库迁移
```
 python .manage.py migrate
```

4.认证系统

　　登录admin后台
- 创建用户
```
 python .manage.py createsuperuser
```

引用认证登录

修改login函数

def login_action(request):
    if request.method == 'POST':
        username = request.POST.get('username','')
        password = request.POST.get('password', '')
        user = auth.authenticate(username = username, password = password)
        if user is not None:
            auth.login(request,user)
        #if username == 'admin' and password == 'admin':
        
            response =  HttpResponseRedirect('/event_manage/')
            request.session['user'] = username
            return  response
            #return render(request,'event_manage.html')#BUILD2
            #return HttpResponse('登录成功')
        else:
            return  render(request,'index.html',{'error':'用户名或者密码错误'})

使用装饰器关窗
- 使用自带login_required装饰登录后才能展示的函数
- 修改url路由