Buttons that change the default order of items. How can this work?

from flask import redirect, url_for, render_template

@app.route("/home")
@app.route("/")
def root():
    return redirect(url_for('root', ordering_by='date_created')


@app.route("/home/")
@app.route("/")
def root(ordering_by):    
    page = request.args.get('page', 1, type=int)
    movies = None
    match ordering_by:
        case 'rating':
            movies = Movie.query.order_by(Movie.rating.desc())
        case 'release_year':
            movies = Movie.query.order_by(Movie.release_year.desc())
        case 'date_created':
            movies = Movie.query.order_by(Movie.date_created.desc())
        case _:
            movies = Movie.query.all() 
    return render_template("index.html", movies=movies.paginate(per_page=5, page=page)