Action Controller OverviewIn this guide, you will learn how controllers work and how they fit into the request cycle in your application.After reading this guide, you will know how to: Follow the flow of a request through a controller. Access parameters passed to your controller. Use Strong Parameters and permit values. Store data in the cookie, the session, and the flash. Work with action callbacks to execute code during request processing. Use the Request and Response Objects.| Ruby on Rails Guides
Active Record MigrationsMigrations are a feature of Active Record that allows you to evolve your database schema over time. Rather than write schema modifications in pure SQL, migrations allow you to use a Ruby Domain Specific Language (DSL) to describe changes to your tables.After reading this guide, you will know: Which generators you can use to create migrations. Which methods Active Record provides to manipulate your database. How to change existing migrations and update your schema. How ...| Ruby on Rails Guides