# 创建超级用户
python manage.py createsuperuser
from django.contrib import auth

from django.contrib.auth import authenticate

user = authenticate(username="user",password="pwd")

from django.contrib.auth import authenticate, login

def log_in(request):
 if request.method == "POST":
  user = request.POST.get("username")
  pwd = request.POST.get("password")
  user = authenticate(username=user, password=pwd)
  if user is not None:
   login(request, user)
   # Redirect to a success page
   ...
  else:
   # Return an "invalid login" error message.
   ...
 return render(request, "login.html")

from django.contrib.auth import logout

def log_out(request):
 logout(request)
 # Redirect to a success page.

def my_view(request):
 if not request.user.is_authenticated():
  return redirect('%s"htmlcode">

from django.contrib.auth.decorators import login_required

@login_required
def my_view(request):
 ...


使用login_requierd()注意：
若用户没有登录，则会跳转到django默认的登录URL '/accounts/login/ '；并传递当前访问url的绝对路径 (登陆成功后，会重定向到该路径)。
如果需要自定义登录的URL，则需要在settings.py文件中通过LOGIN_URL进行修改。


LOGIN_URL = "/login/" # 这里配置成项目登录页面的路由


create_user()创建用户


from django.contrib.auth.models import User

user = User.objects.create_user（username="", password="", email="", ...）


create_superuser()创建超级用户


from django.contrib.auth.models import User

user = User.objects.create_superuser（username="", password="", email="", ...）


check_password(password)
检查密码是否正确的方法；密码正确返回True，否则返回False。


ret = user.check_password("密码")


set_password(password)
一个修改密码的方法，接收要设置的新密码作为参数。
注意：设置完一定要调用User对象的save方法！！！


user.set_password(password="")
user.save()


修改密码示例：


@login_required
def alter_password(request):
 user = request.user
 err_msg = ""
 if request.method == 'POST':
  old_password = request.POST.get("old_password", "")
  new_password = request.POST.get("new_password", "")
  repeat_password = request.POST.get("repeat_password", "")
  if user.check_password(old_password):
   if not new_password:
    err_msg = "新密码不能为空"
   elif new_password != repeat_password:
    err_msg = "两次密码不一致"
   else:
    user.set_password(new_password)
    user.save()
    return redirect("/log_in/")
  else:
   err_msg = "原密码输入错误"
 content = {
  "err_msg": err_msg,
 }
 return render(request, "alter_password.html", content)


三、扩展默认的auth_user表


通过继承内置的 AbstractUser 类，来定义一个自己的Model类。这样既能根据项目需求灵活的设计用户表，又能使用Django强大的认证系统了。


# models.py

from django.db import models
from django.contrib.auth.models import AbstractUser


class UserInfo(AbstractUser):
 age = models.IntegerField(default=18)
 phone = models.CharField(max_length=11, null=True, unique=True)

 def __str__(self):
  return self.username


注意：
按上面的方式扩展了内置的auth_user表之后，一定要在settings.py中告诉Django，我现在使用我新定义的UserInfo表来做用户认证：


# 引用Django自带的User表，继承使用时需要设置
AUTH_USER_MODEL = "app名.UserInfo"


一旦我们指定了新的认证系统所使用的表，我们就需要重新在数据库中创建该表，而不能继续使用原来默认的auth_user表了。
四、示例


views.py


from django.shortcuts import render, redirect
from django.contrib.auth import authenticate, login, logout
from django.contrib.auth.decorators import login_required
# from django.contrib.auth.models import User
from appxx import models


def sign_up(request):
  error_msg = ""
  if request.method == "POST":
    user = request.POST.get("username")
    pwd = request.POST.get("password")
    if models.UserInfo.objects.filter(username=user):
      error_msg = "用户已存在"
    else:
      new_user = models.UserInfo.objects.create_user(username=user, password=pwd)
      new_user.save()
      return redirect("/login/")
  content = {
    "error_msg": error_msg
  }
  return render(request, "register.html", content)


def log_in(request):
  if request.method == "POST":
    user = request.POST.get("username")
    pwd = request.POST.get("password")
    user = authenticate(username=user, password=pwd)
    if user is not None:
      login(request, user)
      return redirect("/index/")
  return render(request, "login.html")


@login_required
def index(request):
  return render(request, "index.html")


def log_out(request):
  logout(request)
  return redirect("/login/")


sign_up 函数部分原本使用 User.objects，但因为使用了 UserInfo 表代替了 django 内置的 auth_user 表，所以需要改为 models.UserInfo.objects
login.html


<!DOCTYPE html>
<html lang="zh-cn">
<head>
  <meta charset="UTF-8">
  <title>登录</title>
</head>
<body>
<h1>登录页面</h1>
<form action="/login/" method="post">
  {% csrf_token %}
  <p>
    <label for="username">账号：</label>
    <input type="text" id="username" name="username">
  </p>
  <p>
    <label for="password">密码：</label>
    <input type="password" id="password" name="password">
  </p>
  <p>
    <label for="submit"></label>
    <input type="submit" value="登录">
  </p>
</form>
</body>
</html>


register.html


<!DOCTYPE html>
<html lang="zh-cn">
<head>
  <meta charset="UTF-8">
  <title>注册</title>
</head>
<body>
<h1>注册页面</h1>
<form action="/register/" method="post">
  {{ error_msg }}
  {% csrf_token %}
  <p>
    <label for="username">账号：</label>
    <input type="text" id="username" name="username">
  </p>
  <p>
    <label for="password">密码：</label>
    <input type="password" id="password" name="password">
  </p>
  <p>
    <label for="submit"></label>
    <input type="submit" value="注册">
  </p>
</form>
</body>
</html>


index.html


<!DOCTYPE html>
<html lang="zh-cn">
<head>
  <meta charset="UTF-8">
  <title>index</title>
</head>
<body>
<h1>index页面</h1>
<p>欢迎：{{ request.user.username }}</p>
<a href="/logout/">注销登录</a>
</body>
</html>


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。