I don't get it. If I set the Accept-Language header to anything other than "en" (de, pl, es) or even something that doesn't exist (like xxs), the app doesn't spit out this error, but it does when I set it to "en". It happens only on windows (newest gettext tools). Here's the stack trace:
Traceback (most recent call last): File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\core\han dlers\exception.py", line 39, in inner response = get_response(request) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\core\han dlers\base.py", line 244, in _legacy_get_response response = middleware_method(request) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\middlewa re\locale.py", line 29, in process_request translation.activate(language) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\__init__.py", line 161, in activate return _trans.activate(language) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\trans_real.py", line 238, in activate _active.value = translation(language) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\trans_real.py", line 227, in translation _translations[language] = DjangoTranslation(language) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\trans_real.py", line 129, in __init__ self._add_installed_apps_translations() File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\trans_real.py", line 176, in _add_installed_apps_translations translation = self._new_gnu_trans(localedir) File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\utils\tr anslation\trans_real.py", line 156, in _new_gnu_trans fallback=use_null_fallback) File "C:\Python35\lib\gettext.py", line 426, in translation t = _translations.setdefault(key, class_(fp)) File "C:\Python35\lib\gettext.py", line 162, in __init__ self._parse(fp) File "C:\Python35\lib\gettext.py", line 297, in _parse self.plural = c2py(plural) File "C:\Python35\lib\gettext.py", line 76, in c2py raise ValueError('plural forms expression could be dangerous') ValueError: plural forms expression could be dangerous I have plural-forms set up correctly in my django.po file:
"Plural-Forms: nplurals=2; plural=(n != 1);\n" Why does this happen and how to fix it?
3 Answers
Answers 1
I found an answer - the reason for that error is my incompetence :). I ran django-admin makemessages command in the root of my project, so next to _env and all the packages inside. This command created language files for a couple of projects with the default django.po file template, so they contained something like plural-forms=INTEGER and other stuff and this was causing the above error.
Answers 2
Your plural expression (n != 1) is most likely considered dangerous because it's too inclusive. n doesn't equal 1 means any value except 1 will evaluate to True including booleans, strings or None.
Try changing your expression to use equals, greater than and less than operations to narrow down the scope of the expression.
Answers 3
Here I will give you all the details about Plural-forms:
See this link Plural-forms.It will helps to you.
Note:This just link give a simple idea about plural
It surely helps to others
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