Django用内置方法实现登录

一 内置登录退出思维导图

二 Django内置登录方法

1 位置

2 源码

@deprecate_current_app
@sensitive_post_parameters()
@csrf_protect
@never_cache
# 视图函数要渲染的模板位置（registration/login.html）
def login(request, template_name='registration/login.html',
          redirect_field_name=REDIRECT_FIELD_NAME,
          authentication_form=AuthenticationForm,
          extra_context=None, redirect_authenticated_user=False):
    """
    Displays the login form and handles the login action.
    """
    redirect_to = request.POST.get(redirect_field_name, request.GET.get(redirect_field_name, ''))

    if redirect_authenticated_user and request.user.is_authenticated:
        redirect_to = _get_login_redirect_url(request, redirect_to)
        if redirect_to == request.path:
            raise ValueError(
                "Redirection loop for authenticated user detected. Check that "
                "your LOGIN_REDIRECT_URL doesn't point to a login page."
            )
        return HttpResponseRedirect(redirect_to)
    elif request.method == "POST":
        form = authentication_form(request, data=request.POST)
        if form.is_valid():
            auth_login(request, form.get_user())
            return HttpResponseRedirect(_get_login_redirect_url(request, redirect_to))
    else:
        form = authentication_form(request)

    current_site = get_current_site(request)

    context = {
        'form': form,
        redirect_field_name: redirect_to,
        'site': current_site,
        'site_name': current_site.name,
    }
    if extra_context is not None:
        context.update(extra_context)

    return TemplateResponse(request, template_name, context)

三 实战一 

1 编辑mysite/account/urls.py

from django.conf.urls import url
from . import views
from django.contrib.auth import views as auth_views

urlpatterns = [
    # 自定义登录
    # url(r'^login/$', views.user_login, name='user_login'),
    # django内置的登录
    url(r"^login/$", auth_views.login, name="user_login"),
]

2 因为默认的模板位置为registration/login.html，因此我们创建该文档如下：

{% extends "base.html" %}
{% block title %}登录{% endblock %}
{% block content %}

	
登录
	
请输入用户名和密码
    
	

		{% csrf_token %}
        
        
        
        

			Username
			
{{ form.username }}
		
		

			Password
			
{{ form.password }}
		
		
	

{% endblock %}

3 修改mysite/mysite/settings.py

# 登录后重定向到http://localhost:8000/blog/页面
LOGIN_REDIRECT_URL = '/blog/'

4 测试

四 实战二

1 编辑mysite/account/urls.py

from django.conf.urls import url
from . import views
from django.contrib.auth import views as auth_views

urlpatterns = [
    # 自定义登录
    # url(r'^login/$', views.user_login, name='user_login'),
    # django内置的登录
    url(r"^login/$", auth_views.login, name="user_login"),
    url(r"^new-login/$", auth_views.login, {"template_name": "account/login.html"}),
]

2 测试