class Meta: indexes = [ PartialIndex(fields=["skill", "user"], unique=True, where=PQ(deleted=False)) ]
class Meta: indexes = [PartialIndex(fields=["facility", "item"], unique=True, where=PQ(deleted=False))]
class Meta: indexes = [ PartialIndex(fields=["patient", "disease"], unique=True, where=PQ(deleted=False)) ]