Rails Framework is one of the greatest supporters for Rapid Application Development (RAD) which tends to abstract and simplify the web architecture so that Rails abstracts away the database through the Active Record which is the Object-relational mapping (ORM) for rails.
The Active Record is the layer of the system responsible for representing business data and logic. Active Record facilitates the creation and use of business objects whose data requires persistent storage to a database.
So, It helps in a way to manage all relations consistency and mapping in the class model without the need to write SQL statement to retrieve any data or the usage of CRUD (create, read, update, and delete) methods in general. Read more