def validate_unique(self, value): if next(duplicated(value), None): raise ValidationError('Values must be unique.')
def _validate_field_labels_unique(fields): "Field labels must be unique" if next(duplicated(f.label for f in fields), None): raise ValidationError("Labels must be unique")
def _validate_field_names_unique(fields): "Field names must be unique" if next(duplicated(f.name for f in fields), None): raise ValidationError("Names must be unique")