调试Django权限错字

Question

如何在django中调试权限问题？

我用这样的代码：

if request.user.has_perm('foo.bar'): 

我怎么能知道是否有在“foo.bar”一个错字？

Answer 1

我找到了答案。只需修改（临时）backends.py的代码：

--- django/contrib/auth/backends.py (Revision 17045) 
+++ django/contrib/auth/backends.py (Arbeitskopie) 
@@ -43,6 +43,9 @@ 
     return user_obj._perm_cache 

    def has_perm(self, user_obj, perm): 
+  all_perms=[u'%s.%s' % (ct, name) for ct, name in Permission.objects.values_list('content_type__app_label', 'codename')] 
+  if not perm in all_perms: 
+   raise Exception('Permission %s does not exist. foo permissions: %s' % (perm, [p for p in all_perms if 'foo' in p])) 
     if not user_obj.is_active: 
      return False 
     return perm in self.get_all_permissions(user_obj) 

Answer 2

嗯，我想你可以看看所有定义的权限：

from django.contrib.auth.models import Permission 
perms = ['%s.%s' % (p.content_type.app_label, p.codename) 
    for p in Permission.objects.all()] 

>>> 'foo.bar' in perms 
False