潭州课堂25班：Ph201805201 django框架 第十三课 自定义404页面，auth系统中的User模型，auth系统权限管理 (课堂笔记)

from django.shortcuts import render,redirect,reverse
from django.http import HttpResponse
from .forms import *        # 导入 form 文件

#     导入 auth 系统的模型，表        用户，  组，    权限
from  django.contrib.auth.models import User,Group,Permission

#     导入 auth 系统的模型，表     登录，    保持登录， 退出
from django.contrib.auth import authenticate, login,    logout


# Create your views here.

def home(request):
    return render(request,'form_test/home.html' )


def login_test(request):
    # 登录
    if request.method =='POST':
        form = LoginForm(request.POST)                #    拿到用户输入信息
        if form.is_valid():                             #  判断合法性
            username = form.cleaned_data.get('username')
            password = form.cleaned_data.get('password')
            # auth 验证用户登录
            user = authenticate(username=username,password=password)
         
            if user:                                        #  登录成功
                login(request,user)                        #   保持登录
                return redirect(reverse('home'))
            else:
                form = RegisterFrom()
                return render(request,'form_test/register.html',{'form':form})
    else:
        form = LoginForm()                                               #    实例化 form 表单
        return render(request,'form_test/login.html',{'form':form})


def register(request):
    # 注册信息
    if request.method =='POST':
        form = RegisterFrom(request.POST)                                # 从 form 表单中拿数据
        if form.is_valid():                                              # 判断数据合不合法
            username = form.cleaned_data.get('username')
            password = form.cleaned_data.get('password')
            password_repeat = form.cleaned_data.get('password_repeat')
            email = form.cleaned_data.get('emil')
            if password == password_repeat:                              # 如果两位再次输入的密码相同，
                #  存入 auth 模型的表中
                User.objects.create_user(username=username,
                                         password=password,
                                         email=email)
                return redirect(reverse('login_test'))                  # 注册成功 后跳转

            else:return redirect(reverse('register'))                   # 失败，重新注册
        else:return redirect(reverse('register'))                       # 如果不合法，重新注册
    else:
        form = RegisterFrom()
        return render(request,'form_test/register.html',{'form':form})


def logout_test(request):
    logout(request)
    return redirect(reverse('home'))