1 from django.core.cache import cache

     2 from guardian.core import ObjectPermissionChecker

     3 from guardian.shortcuts import assign

     4 

     5 def get_checker_for(user):

     6     key_name = 'checker_%s' % user.username

     7     

     8     checker = cache.get(key_name)

     9     if checker:

    10         return checker

    11     

    12     checker = ObjectPermissionChecker(user)

    13     cache.set(key_name, checker, 30)

    14     return checker

    15 

    16 

    17 def assign(perm, user_or_group, object):

    18     assign(perm, user_or_group, object)

    19     

    20     if hasattr('username', user_or_group):

    21         key = 'checker_%s' % user_or_group.username

    22     else:

    23         key = 'checker_%s' % user_or_group.name

    24         

    25     cache.delete('checker_%s' % key)