def producer(item):
    if raw:
        return item[idx]
    model = v.get_model()
    attrs = model._parse_attrs({v.attr_name: item[idx]})
    return attrs[v.attr_name]
def producer(item):
    if raw:
        return item[idx]
    model = v.get_model()
    attrs = model._parse_attrs({v.attr_name: item[idx]})
    return attrs[v.attr_name]