verifying user exists before trying to update

app/controllers/users_controller.rb

@@ -33,6 +33,7 @@ class UsersController < ApplicationController
     #user = User.find(:first, :conditions => ["user_id = ?", "#{params[:user][:user_id]}"])
 
     user = User.find(:first, :conditions => "user_id = '#{params[:user][:user_id]}'")
+    if user
       user.skip_user_id_assign = true
       user.skip_hash_password = true
       user.update_attributes(params[:user].reject { |k| %w(password password_confirmation user_id).include? k })
@@ -45,6 +46,10 @@ class UsersController < ApplicationController
         format.html { redirect_to user_account_settings_path(:user_id => current_user.user_id) }
         format.json { render :json => {:msg => message ? "success" : "false "} }
       end
+    else
+      flash[:error] = "Could not update user!"
+      redirect_to user_account_settings_path(:user_id => current_user.user_id)
+    end
   end
 
 end