def _to_python(self, value, state):
from adhocracy.model import UserBadge
if value is None or value == '':
return []
labels = [l.strip() for l in value.split(',')]
if len(labels) != len(set(labels)):
raise formencode.Invalid(
_("Duplicates in input set of user badge labels"),
value, state)
badges = set()
missing = set()
for label in labels:
badge = UserBadge.find(label, instance_filter=self.instance_filter)
if badge is None:
missing.add(label)
else:
badges.add(badge)
if missing:
raise formencode.Invalid(
_("Could not find badges %s") % ','.join(missing),
value, state)
else:
return badges
