def _to_python(self, value, state):
from adhocracy.model import UserBadge
if value is None:
if self.not_empty:
raise formencode.Invalid(_('No badges selected'), value, state)
return []
if isinstance(value, (str, unicode)):
value = [value]
if len(value) != len(set(value)):
raise formencode.Invalid(
_("Duplicates in input set of user badge IDs"),
value, state)
if self.not_empty and not value:
raise formencode.Invalid(_('No badges selected'), value, state)
badges = UserBadge.findall_by_ids(value)
if len(badges) != len(value):
missing = set(value).difference(b.id for b in badges)
raise formencode.Invalid(
_("Could not find badges %s") % ','.join(map(str, missing)),
value, state)
return badges
