Sign up for a Heroku account and install the toolbelt if you haven't already.

In your Gemfile, add

Sign up for a Heroku account and install the toolbelt if you haven't already.

In your Gemfile, add

We will be using the [Devise gem][2] to help us get started with authentication (are you who you say you are?) and authorization (are you allowed to do/see this?).

• Add gem 'devise' to your Gemfile and bundle
• rails g devise:install

Devise will give you some setup instructions. We don't need to worry about most of them, but we do need to set a root URL. Usually, you will point the root URL to the index action of some important resource in your application: In config/routes.rb:

Here is a quick reference on how to insert, retrieve, update, and delete rows from your database tables using our ActiveRecord-backed Ruby classes.

First, we need a Ruby class to represent the real-world thing we're trying to model, and we need an underlying database table to store information about each individual thing.

Rails includes an easy generator to help us get set up with both of these things quickly. Supposed I wanted to create a table to store instructors, with two string columns first_name and last_name. I could use this shortcut from the Command Line: