Stack Overflow: http://stackoverflow.com/questions/9496277/newbie-issues-with-updating-redirect-profile-and-friendly-id

profile_controller.rb

def edit
  @profile = Profile.find(params[:username])
  what = params[:what]

  if not what.nil?
    if ["basics", "location", "details", "photos", "interests"].member?(what)
      render :action => "edit_#{what}"
    else
      render :action => "edit_basics"
    end
  end
end

### CHANGE TO ###

def edit
  @profile = Profile.find(params[:username])
  what = params[:what]

  # OPTIONALLY USE .include? INSTEAD OF .member?
  if ["basics", "location", "details", "photos", "interests"].member?(what)
    render :action => "edit_#{what}"
  else
    render :action => "edit_basics"
  end if what.present?
end