AJAX movie rating snippet

server.py

@app.route("/movies/ajax/<int:movie_id>", methods=['POST'])
def movie_detail_ajax_process(movie_id):
    """Add/edit a rating."""

    # Get form variables
    score = int(request.form["score"])

    user_id = session.get("user_id")
    if not user_id:
        raise Exception("No user logged in.")

    rating = Rating.query.filter_by(user_id=user_id, movie_id=movie_id).first()

    if rating:
        rating.score = score
        added = False

    else:
        rating = Rating(user_id=user_id, movie_id=movie_id, score=score)
        added = True
        db.session.add(rating)

    db.session.commit()

    try:
        1/0
    except ZeroDivisionError:
        return jsonify({"status": "error", "detail": "omg zero"})

    # if True:
    #     return jsonify({"status": "error", "detail": "too many ratings"})

    if added:
        return jsonify({"status": "added", "score": score})
    else:
        return jsonify({"status": "updated", "score": score})