removes user_id column from User model to use idiomatic Rails automatic IDs

app/controllers/users_controller.rb

@@ -10,7 +10,7 @@ class UsersController < ApplicationController
   def create
     user = User.new(user_params)
     if user.save
-      session[:user_id] = user.user_id
+      session[:user_id] = user.id
       redirect_to home_dashboard_index_path
     else
       @user = user
@@ -26,22 +26,21 @@ class UsersController < ApplicationController
   def update
     message = false
 
-    user = User.where("user_id = '#{params[:user][:user_id]}'")[0]
+    user = User.where("id = '#{params[:user][:id]}'")[0]
 
     if user
-      user.skip_user_id_assign = true
       user.update_attributes(user_params_without_password)
       if params[:user][:password].present? && (params[:user][:password] == params[:user][:password_confirmation])
         user.password = params[:user][:password]
       end
       message = true if user.save!
       respond_to do |format|
-        format.html { redirect_to user_account_settings_path(user_id: current_user.user_id) }
-        format.json { render json: {msg: message ? "success" : "false "} }
+        format.html { redirect_to user_account_settings_path(user_id: current_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)
+      redirect_to user_account_settings_path(user_id: current_user.id)
     end
   end