login_required -- 登录验证

方法源码:

def login_required(function=None, redirect_field_name=REDIRECT_FIELD_NAME, login_url=None):

"""

Decorator for views that checks that the user is logged in, redirecting

to the log-in page if necessary.

"""

actual_decorator = user_passes_test(

lambda u: u.is_authenticated,

login_url=login_url,

redirect_field_name=redirect_field_name

)

if function:

return actual_decorator(function)

return actual_decorator

# user_passes_test源码

def user_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):

"""

Decorator for views that checks that the user passes the given test,

redirecting to the log-in page if necessary. The test should be a callable

that takes the user object and returns True if the user passes.

"""

def decorator(view_func):

@wraps(view_func)

def _wrapped_view(request, *args, **kwargs):

if test_func(request.user):

return view_func(request, *args, **kwargs)

path = request.build_absolute_uri()

resolved_login_url = resolve_url(login_url or settings.LOGIN_URL)

# If the login url is the same scheme and net location then just

# use the path as the "next" url.

login_scheme, login_netloc = urlparse(resolved_login_url)[:2]

current_scheme, current_netloc = urlparse(path)[:2]

if ((not login_scheme or login_scheme == current_scheme) and

(not login_netloc or login_netloc == current_netloc)):

path = request.get_full_path()

from django.contrib.auth.views import redirect_to_login

return redirect_to_login(

path, resolved_login_url, redirect_field_name)

return _wrapped_view

return decorator

使用方法:

login_url取值方法:resolved_login_url = resolve_url(login_url or settings.LOGIN_URL) 默认会跳转到/accounts/login/页面进行重新登录.可以自己定义登录页面的url为/accounts/login/或在设置(settings.py)中设置LOGIN_URL覆盖默认设置.推荐还是遵循django源码,自己定义登录页面的url为/accounts/login/

# 普通写法

from django.contrib.auth.decorators import login_required

@login_required(login_url='/accounts/login/')

def my_view(request):

...

# 通用视图:

from django.urls import path

from rest_framework.urlpatterns import format_suffix_patterns

from django.contrib.auth.decorators import login_required

from okr import views

urlpatterns = [

path("accounts/login/", views.LoginView.as_view(), name="login"),

path("home/", login_required(views.HomeView.as_view()), name="home")

]