我正在使用 Django user_passes_test 装饰器来检查用户权限。
@user_passes_test(lambda u: has_add_permission(u, "project"))
def create_project(request):
......
我正在调用一个回调函数 has_add_permission,它接受两个参数用户和一个字符串。我想将请求对象连同它一起传递,这可能吗?另外,谁能告诉我我们如何能够直接访问装饰器内的用户对象。
我正在使用 Django user_passes_test 装饰器来检查用户权限。
@user_passes_test(lambda u: has_add_permission(u, "project"))
def create_project(request):
......
我正在调用一个回调函数 has_add_permission,它接受两个参数用户和一个字符串。我想将请求对象连同它一起传递,这可能吗?另外,谁能告诉我我们如何能够直接访问装饰器内的用户对象。
不,您不能将请求传递给user_passes_test
. 要了解它为什么以及如何工作,只需转到源代码:
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, assigned=available_attrs(view_func))
def _wrapped_view(request, *args, **kwargs):
if test_func(request.user):
return view_func(request, *args, **kwargs)
path = request.build_absolute_uri()
# 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.urlparse(login_url or
settings.LOGIN_URL)[:2]
current_scheme, current_netloc = urlparse.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, login_url, redirect_field_name)
return _wrapped_view
return decorator
user_passes_test
这是装饰器背后的代码。如您所见,传递给装饰器的测试函数(在您的情况下为lambda u: has_add_permission(u, "project")
)仅传递了一个参数request.user
. 现在,当然可以编写自己的装饰器(甚至直接复制此代码并对其进行修改)也可以传递request
自身,但您不能使用默认user_passes_test
实现来做到这一点。
请注意,Django 1.9 引入了UserPassesTestMixin
,它使用方法test_func
作为测试函数。这意味着该请求在self.request
. 所以你可以做这样的事情:
class MyView(UserPassesTestMixin, View):
def test_func(self):
return has_add_permission(self.request.user, self.request)
然而,这只适用于基于类的视图。
我发现编辑user_passes_test
让装饰功能运行request
而不是request.user
过于困难。我在这篇博客文章中有一个关于视图装饰器装饰器的简短版本,但为了后代,这是我完整编辑的代码:
def request_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):
"""
Decorator for views that checks that the request passes the given test,
redirecting to the log-in page if necessary. The test should be a callable
that takes the request object and returns True if the request passes.
"""
def decorator(view_func):
@wraps(view_func, assigned=available_attrs(view_func))
def _wrapped_view(request, *args, **kwargs):
if test_func(request):
return view_func(request, *args, **kwargs)
path = request.build_absolute_uri()
# urlparse chokes on lazy objects in Python 3, force to str
resolved_login_url = force_str(
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
几乎我唯一做的就是更改if test_func(request.user):
为if test_func(request):
.