6.2实现用户登录逻辑

在users模块的views.py中写登录函数，然后在urls.py中引用这个函数，实现登录逻辑。

users > views.py 代码：

from django.shortcuts import render, redirect
from django.contrib.auth import authenticate, login


# Create your views here.


def user_login(request):
    if request.method == 'GET':
        return render(request, 'login.html', {})
    if request.method == 'POST':
        user_name = request.POST.get('username', '')
        pass_word = request.POST.get('password', '')
        # 成功返回user,失败返回None
        user = authenticate(username=user_name, password=pass_word)
        if user is not None:
            login(request, user)  # 直接登录
            return redirect('home')
        else:
            return render(request, 'login.html', {'msg': '用户名或密码错误。'})

urls.py中的代码：

from django.contrib import admin
from django.urls import path
import xadmin
from django.views.generic import TemplateView
from users.views import user_login

urlpatterns = [
    path('xadmin/', xadmin.site.urls),
    path('', TemplateView.as_view(template_name='index.html'), name='home'),
    # path('login/', TemplateView.as_view(template_name='login.html'), name='login'),
    path('login/', user_login, name='login'),
]

修改index.html中的登录部分，添加登录判断：

                <div class="wp">
                    <div class="fl"><p>服务电话：<b>33333333</b></p></div>
                    <!--登录后跳转-->
                    {% if request.user.is_authenticated %}
                        <div class="personal">
                            <dl class="user fr">
                                <dd>bobby<img class="down fr" src="/static/images/top_down.png"/></dd>
                                <dt><img width="20" height="20" src="/static/media/image/2016/12/default_big_14.png"/>
                                </dt>
                            </dl>
                            <div class="userdetail">
                                <dl>
                                    <dt><img width="80" height="80"
                                             src="/static/media/image/2016/12/default_big_14.png"/>
                                    </dt>
                                    <dd>
                                        <h2>django</h2>
                                        <p>bobby</p>
                                    </dd>
                                </dl>
                                <div class="btn">
                                    <a class="personcenter fl" href="usercenter-info.html">进入个人中心</a>
                                    <a class="fr" href="/logout/">退出</a>
                                </div>
                            </div>
                        </div>
                    {% else %}
                        <a style="color:white" class="fr registerbtn" href="/register/">注册</a>
                        <a style="color:white" class="fr loginbtn" href="/login/">登录</a>
                    {% endif %}


                </div>