django 自帶認證系統（login，logout，authenticate，login_required）

from django.contrib.auth import login,authenticate,logout
from django.contrib.auth.decorators import login_required

setting.py

AUTH_USER_MODEL = 'mytest.User'         #app名字.表名字

LOGIN_URL="/mytest/login/"              #如果沒有登錄，將會返回的url,用於裝飾器 @login_required()

model.py(重構User model)

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

# Create your models here.
class User(AbstractUser):
    nickname = models.CharField(max_length=50, blank=True)

    class Meta(AbstractUser.Meta):
        verbose_name = "用戶信息"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.username

view.py

def acc_login(req):
    if req.method == "GET":
        return render(req,"acc_login.html")
    else:     
        email=req.POST.get("acc")
        pwd=req.POST.get("pwd")
        print("user:%s-%s" % (email,pwd))
        user=authenticate(username=email,password=pwd)#驗證:返回驗證對象,失敗則是None，成功返回username
        print("user:%s"%user)
        if user:
            login(req,user)
            # next_url = req.GET.get("next", '../index')
            # return redirect(next_url)
            return redirect("/mytest/index/")
        else:
            error="賬號或者密碼錯誤"
            return render(req, "acc_login.html",{'error':error})

def acc_logout(req):
        logout(req)
        return redirect("/mytest/login/")

@login_required()
def index(request):
    context = {"key": "ok"}
    return render(request,'index.html',context)



# 關於User model 密碼，需要用 set_password

def test_create(req):
    user = models.User(
        username='jam',
        nickname= 'jam'
    )
    user.set_password('1234')
    return HttpResponse("ok")