Auth authentication module

When performing database migration that two commands, even if we do not build the table, django is not also create a lot of tables? We take a look inside After you create a table called auth_user, since it is a table, it is certainly there should be a corresponding change operation table method

Add auth_user table records

Create a super user (not manually inserted, because the password is encrypted)

Simple to use auth certification

from django.contrib import auth
def login(request):
  if request.method == 'POST':
    name = request.POST.get('name')
    pwd = request.POST.get('pwd')
    user = auth.authenticate(request,username=name,password=pwd)
    # 类似于user=models.User.objects.filter(username=name,password=pwd).first()
    if user:
      return redirect('/home/')
  return render(request,'login.html')

Simply not verify the information, you also need to save the user's current successful landing of the landing state, before a cookie or by session, it is now, auth also provides you with a more useful method
```
if user:
  # 等价于request.session['name']=name
  auth.login(request,user)  # 登陆，其实就把用户信息放到session中，跑一下验证session表
```

In fact, the above authentication and landing than its highlights, highlights that

# 只要登陆成功执行了auth.login(request,user)
# 之后在其他任意的视图函数中都通过request.user获取当前登陆用户对象

# 当没有执行auth.login,request.user打印出来的是匿名用户。将session表数据删除即可演示改效果
# 如何判断request.user用户是否通过auth.login登陆呢？request.user.is_authenticated

# 为何执行auth.login之后，其他视图函数中就可以通过request.user拿到当前登陆对象呢？想想django的中间件中有没有一个叫Auth啥的中间件，它干了件什么事，能不能推导一下？取出session去表里面查相应的数据，然后放到request.user中，点进去看一下这个中间件确实如此

Logout

auth.logout(request)
# 等价于删除session数据request.session.flush()

Decorator check whether the landing and jump

from django.contrib.auth.decorators import login_required

@login_required(login_url='/login/',redirect_field_name='old')  # 没登陆会跳转到login页面，并且后面会拼接上你上一次想访问的页面路径/login/?next=/test/,可以通过参数修改next键名
def my_view(request):
  pass

If all the functions need to decorate my view and jump to the login page, then I need to write a lot of copies

# 可以在配置文件中指定auth校验登陆不合法统一跳转到某个路径
LOGIN_URL = '/login/'  # 既可以局部配置，也可以全局配置

Back to the top, we are how to add data to auth_user table? ~ ~ ~ Command line is not reasonable?

from django.contrib.auth.models import User
def register(request):
  User.objects.create()  # 不能用这个，因为密码是明文
  User.objects.create_user()  # 创建普通用户
  User.objects.create_superuser()  # 创建超级用户

Check passwords, change passwords

request.user.check_password(pwd)  # 为什么不直接获取查，因为前端用户输入的是明文数据库密文

request.user.set_password(pwd)
request.user.save()  # 修改密码

Custom application auth function model table

How to expand auth_user table?

One association (not recommended)

from django.contrib.auth.model s import User

class UserDetail(models.Models):
  phone = models.CharField(max_length=11)
  user = models.OnoToOneField(to=User)

Object-oriented inheritance

from django.contrib.auth.models import User,AbstractUser
class UserInfo(AbstractUser):
  phone = models.CharField(max_length=32)

# 需要在配置文件中，指定我不再使用默认的auth_user表而是使用我自己创建的Userinfo表
AUTH_USER_MODEL = "app名.models里面对应的模型表名"


"""
自定义认证系统默认使用的数据表之后，我们就可以像使用默认的auth_user表那样使用我们的UserInfo表了。
库里面也没有auth_user表了，原来auth表的操作方法，现在全部用自定义的表均可实现
"""

41.django the auth user authentication

Auth authentication module

Custom application auth function model table

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