How to update the domain model object based on the domain model parameter passed to Edit action method?

I have an action method to handle the HTTP-POST as follows.

    [HttpPost]
    public ActionResult Edit(Movie model)
    {
        var movie = db.Movies.FirstOrDefault(x => x.Id == model.Id);

        if (movie == null)
        {
            TempData["MESSAGE"] = "No movie with id = " + id + ".";
            return RedirectToAction("Index", "Home");
        }

        if (!ModelState.IsValid)
            return View(model);

        // what method do I have to invoke here
        // to update the movie object based on the model parameter?
        db.SaveChanges();
        return RedirectToAction("Index");
    }

Question: How to update movie based on model ?

Edit 1

Based on @lukled's solution, here is the final and working code:

    [HttpPost]
    public ActionResult Edit(Movie model)
    {
        var movie = db.Movies.FirstOrDefault(x => x.Id == model.Id);

        if (movie == null)
        {
            TempData["MESSAGE"] = string.Format("There is no Movie wit开发者_JS百科h id = {0}.", movie.Id);
            return RedirectToAction("Index", "Home");
        }

        if (!ModelState.IsValid)
            return View(model);

        var entry = db.Entry(movie);
        entry.CurrentValues.SetValues(model);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

Try this:

db.Movies.ApplyCurrentValues(model);
db.SaveChanges();

You can also just copy values from model to movie:

movie.Title = model.Title;
movie.Director = model.Director;
db.SaveChanges();

OK. You are using Code First, so it will be probably:

var entry = context.Entry(movie);
entry.CurrentValues.SetValues(model);
db.SaveChanges();

But I am not sure about it, because I don't have Code First installed. Taken from:

http://blogs.msdn.com/b/adonet/archive/2011/01/30/using-dbcontext-in-ef-feature-ctp5-part-5-working-with-property-values.aspx

[HttpPost]
public ActionResult Edit(Movie movie)
{

    if (movie == null)
    {
        TempData["MESSAGE"] = "No movie with id = " + id + ".";
        return RedirectToAction("Index", "Home");
    }

    if (!ModelState.IsValid)
        return View(movie);

    // what method do I have to invoke here
    // to update the movie object based on the model parameter?

    db.Movie.AddObject(movie);
    db.ObjectStateManager.ChangeObjectState(movie, System.Data.EntityState.Modified);

    db.SaveChanges();
    return RedirectToAction("Index");
}

Have you tried

TryUpdateModel(movie)