ActiveRecord

What is ActiveRecord?

Active Record is the model layer of the system which is responsible for representing the business data and logic. This means it facilitates the creation and use of business objects whose data requires persistent storage to a database. It is a Active Record pattern which is a description of a ORM system.

Active Record Patter

In Active Record, objects carry both persistent data and behaviour which operates on that persistent data. Active Record is used in this way so that access logic being part of the object will educate users of that object on how to read and write from the database.

ORM or Object Relational Mapping

ORM is a technique that connects the rich objects of an application to tables in a relational database management system. Using ORM means that an objects can be easily stored and retrieved from a database without writing SQL statements directly and with less overall database access code.

ActiveRecord as an ORM

Active Record gives us several mechanisms, the most important being the ability to:

Represent models, their data, their relationship to other models, the inheritance through the related models, validating the models before they achieve persistence and perform those operations in an object oriented way.

Migrations

The Migrations for ActiveRecord are located in $ beef/core/main/ar-migrations

They look like this: 001_create_command_modules.rb where the class looks like this:

`` class CreateCommandModules < ActiveRecord::Migration[6.0]

def change

    create_table :command_modules do |t|

        t.text :name 

        t.text :path

    end

end

end ``

Refer to the Database Scheme