Django初学者在这里。
我一直在使用内置的login_required
装饰器。我想覆盖某些推荐网址与特定模式匹配的用户(例如,所有来自/buy_and_sell/
的用户)。
我的目的是为这些用户显示一个特殊的登录页面,并为其他人显示一个通用页面。
我一直在研究编写自定义装饰器的各种示例(例如here,here,here和here)。但我发现初学者很难掌握这些定义。有人能给我一个外行人的理解(最好是说明性的例子)我如何解决我的问题?
答案 0 :(得分:2)
Django中包含user_passes_test装饰器。您不必自己制作装饰。
from django.contrib.auth.decorators import user_passes_test
def check_special_user(user):
return user.filter(is_special=True)
# if not the special user it will redirect to another login url , otherwise process the view
@user_passes_test(check_special_user,login_url='/login/')
def my_view(request):
pass
...
需要装饰器中的请求
为此,请在您的项目或应用中制作user_passes_test的克隆版本并进行如下更改
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, assigned=available_attrs(view_func))
def _wrapped_view(request, *args, **kwargs):
if test_func(request.user): # change this line to request instead of 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
将test_func(request.user)更改为test_func(request),您将获得 装饰函数中的整个请求。
修改:在url.py中,
url (
r'^your-url$',
user_passes_test(check_special_user, login_url='/login/')(
my_view
),
name='my_view'
)
答案 1 :(得分:1)
这是理解python装饰器的最佳答案:How to make a chain of function decorators?
您可以使用login_required
的login_url
参数:
@login_required(login_url='some_url)
另一种方法是创建自定义装饰器,例如documentation of Django:
from django.contrib.auth.decorators import user_passes_test
def email_check(user):
return user.email.endswith('@example.com')
@user_passes_test(email_check)
def my_view(request):
...