today = str(
datetime.date.today())
date_from = request.args.get("date_from", today)
date_to = request.args.get("date_to", today)
if not is_valid_date(date_from):
date_from = today
if not is_valid_date(date_to):
date_to = today
activity = db.session.query(label("date",
func.date(Like.created_at)), label('likes', func.sum(cast(Like.liked, sqlalchemy.Integer)))).filter(
func.date(Like.created_at) >= date_from).filter(
func.date(Like.created_at) <= date_to).group_by(
func.date(Like.created_at)).all()