210 

   211 

   212 class CWCache(EntityType):

   213     """a simple cache entity characterized by a name and

   214     a validity date.

   215 

   216     The target application is responsible for updating timestamp

   217     when necessary to invalidate the cache (typically in hooks).

   218 

   219     Also, checkout the AppObject.get_cache() method.

   220     """

   221     # XXX only handle by hooks, shouldn't be readable/editable at all through

   222     # the ui and so no permissions should be granted, no?

   223     __permissions__ = {

   224         'read':   ('managers', 'users', 'guests'),

   225         'add':    ('managers',),

   226         'update': ('managers', 'users',), # XXX

   227         'delete': ('managers',),

   228         }

   229 

   230     name = String(required=True, unique=True, maxsize=128,

   231                   description=_('name of the cache'))

   232     timestamp = TZDatetime(default='NOW')