Bug #2: Problem with updating user object

The bug was found in the model side as I was trying to update the user object by doing:

@user = User.update(params[:id], {
  :fname => params[:user][:fname],
  :lname => params[:user][:lname],
  :email => params[:user][:email] })

Whenever I tried to update, I'd get this error:

ArgumentError in UserController#update wrong number of arguments (2 for 4)

Could not figure out what was wrong with it from googling. So once again I decided to hop onto my trusty real-time help solution: irc. I got suggested to try this method of updating:

@user = User.find(params[:id])
@user.update_attributes({
:fname => params[:user][:fname],
:lname => params[:user][:lname],
:email => params[:user][:email]}) if @user != nil

This seemed to work perfectly. I still haven't figured out what was the problem with the other one. Perhaps its because I didn't provide the other two parameters that's in the table definition: password_hash and password_salt. I'm not sure.