def ethnic_groups(self):
"Return the ethnic groups of the items"
groups = []
items = self.items.all()
for item in items:
if item.ethnic_group and not item.ethnic_group in groups:
groups.append(item.ethnic_group)
cmp = lambda a, b: unaccent_icmp(a.value, b.value)
groups.sort(cmp)
return groups
def __name_cmp(obj1, obj2):
return unaccent_icmp(obj1.name, obj2.name)
