（1）把前面views中的user_login()函数改成基于类的形式
from django.views.generic.base import View
class LoginView(View):
def get(self,request):
return render(request, 'login.html')
def post(self,request):
# 获取用户提交的用户名和密码
user_name = request.POST.get('username', None)
pass_word = request.POST.get('password', None)
# 成功返回user对象,失败None
user = authenticate(username=user_name, password=pass_word)
# 如果不是null说明验证成功
if user is not None:
# 登录
login(request, user)
return render(request, 'index.html')
else:
return render(request, 'login.html', {'msg': '用户名或密码错误'})
类的urls配置
from users.views import LoginView
path('login/',LoginView.as_view(),name = 'login'),
（2）users下新建form.py文件
# users/forms.py
from django import forms
# 登录表单验证
class LoginForm(forms.Form):
# 用户名密码不能为空
username = forms.CharField(required=True)
password = forms.CharField(required=True,min_length=5)
# users/views.py from django.shortcuts import render from django.contrib.auth import authenticate,login from django.contrib.auth.backends import ModelBackend from .models import UserProfile from django.db.models import Q from django.views.generic.base import View from .forms import LoginForm #邮箱和用户名都可以登录 # 基础ModelBackend类，因为它有authenticate方法 class CustomBackend(ModelBackend): def authenticate(self, request, username=None, password=None, **kwargs): try: # 不希望用户存在两个，get只能有一个。两个是get失败的一种原因 Q为使用并集查询 user = UserProfile.objects.get(Q(username=username)|Q(email=username)) # django的后台中密码加密：所以不能password==password # UserProfile继承的AbstractUser中有def check_password(self, raw_password): if user.check_password(password): return user except Exception as e: return None class LoginView(View): def get(self,request): return render(request, 'login.html') def post(self,request): # 实例化 login_form = LoginForm(request.POST) if login_form.is_valid(): # 获取用户提交的用户名和密码 user_name = request.POST.get('username', None) pass_word = request.POST.get('password', None) # 成功返回user对象,失败None user = authenticate(username=user_name, password=pass_word) # 如果不是null说明验证成功 if user is not None: # 登录 login(request, user) return render(request, 'index.html') # 只有当用户名或密码不存在时，才返回错误信息到前端 else: return render(request, 'login.html', {'msg': '用户名或密码错误','login_form':login_form}) # form.is_valid（）已经判断不合法了，所以这里不需要再返回错误信息到前端了 else: return render(request,'login.html',{'login_form':login_form})
（4）完善login.html的错误提示信息
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1" >
<title>慕学在线网登录</title>
<link rel="stylesheet" type="text/css" href="/static/css/reset.css">
<link rel="stylesheet" type="text/css" href="/static/css/login.css">
</head>
<body>
<div class="dialog" id="jsDialog">
<!--提示弹出框-->
<div class="successbox dialogbox" id="jsSuccessTips">
<h1>成功提交</h1>
<div class="close jsCloseDialog"><img src="/static/images/dig_close.png"/></div>
<div class="cont">
<h2>您的需求提交成功！</h2>
<p></p>
</div>
</div>
<div class="noactivebox dialogbox" id="jsUnactiveForm" >
<h1>邮件验证提示</h1>
<div class="close jsCloseDialog"><img src="/static/images/dig_close.png"/></div>
<div class="center">
<img src="/static/images/send.png"/>
<p>我们已经向您的邮箱<span class="green" id="jsEmailToActive">12@13.com</span>发送了邮件，<br/>为保证您的账号安全，请及时验证邮箱</p>
<p class="a"><a class="btn" id="jsGoToEmail" target="_blank" href="http://mail.qq.com">去邮箱验证</a></p>
<p class="zy_success upmove"></p>
<p style="display: none;" class="sendE2">没收到，您可以查看您的垃圾邮件和被过滤邮件，也可以再次发送验证邮件（<span class="c5c">60s</span>）</p>
<p class="sendE">
没收到，您可以查看您的垃圾邮件和被过滤邮件，<br/>
也可以<span class="c5c green" id="jsSenEmailAgin" style="cursor: pointer;">再次发送验证邮件</span></p>
</div>
</div>
</div>
<div class="bg" id="dialogBg"></div>
<header>
<div class="c-box fff-box">
<div class="wp header-box">
<p class="fl hd-tips">慕学在线网，在线学习平台！</p>
<ul class="fr hd-bar">
<li>服务电话：<span>33333333</span></li>
<li class="active"><a href="login.html">[登录]</a></li>
<li><a href="register.html">[注册]</a></li>
</ul>
</div>
</div>
</header>
<section>
<div class="c-box bg-box">
<div class="login-box clearfix">
<div class="hd-login clearfix">
<a class="index-logo" href="index.html"></a>
<h1>用户登录</h1>
<a class="index-font" href="index.html">回到首页</a>
</div>
<div class="fl slide">
<div class="imgslide">
<ul class="imgs">
<li><a href=""><img width="483" height="472" src="/static/images/mysql.jpg" /></a></li>
<li><a href=""><img width="483" height="472" src="/static/images/mysql.jpg" /></a></li>
<li><a href=""><img width="483" height="472" src="/static/images/mysql.jpg" /></a></li>
</ul>
</div>
<div class="unslider-arrow prev"></div>
<div class="unslider-arrow next"></div>
</div>
<div class="fl form-box">
<h2>帐号登录</h2>
<form action="/login/" method="post" autocomplete="off">
<input type='hidden' name='csrfmiddlewaretoken' value='mymQDzHWl2REXIfPMg2mJaLqDfaS1sD5' />
<div class="form-group marb20 {% if login_form.errors.username %}errorput{% endif %}">
<label>用 户 名</label>
<input name="username" id="account_l" type="text" placeholder="手机号/邮箱" />
</div>
<div class="form-group marb8 {% if login_form.errors.username %}errorput{% endif %}">
<label>密 码</label>
<input name="password" id="password_l" type="password" placeholder="请输入您的密码" />
</div>
<div class="error btns login-form-tips" id="jsLoginTips">
{% for key,error in login_form.errors.items %}
{{ error }}
{% endfor %}
{{ msg }}
</div>
<div class="auto-box marb38">
<a class="fr" href="forgetpwd.html">忘记密码？</a>
</div>
<input class="btn btn-green" id="jsLoginBtn" type="submit" value="立即登录 > " />
<input type='hidden' name='csrfmiddlewaretoken' value='5I2SlleZJOMUX9QbwYLUIAOshdrdpRcy' />
{% csrf_token %}
</form>
<p class="form-p">没有慕学在线网帐号？<a href="register.html">[立即注册]</a></p>
</div>
</div>
</div>
</section>
<script src="/static/js/jquery.min.js" type="text/javascript"></script>
<script src="/static/js/unslider.js" type="text/javascript"></script>
<script src="/static/js/login.js" type="text/javascript"></script>
</body>
</html>
login.html