Working with ActiveRecord in Ruby on Rails


ActiveRecord is a critical component of Ruby on Rails, a popular web application framework. ActiveRecord is an Object-Relational Mapping (ORM) library that simplifies database interactions. In this guide, we'll explore how to use ActiveRecord to perform common database operations, including creating, reading, updating, and deleting records, in a Ruby on Rails application.


Before working with ActiveRecord in Ruby on Rails, make sure you have the following prerequisites:

  • Ruby on Rails installed on your system
  • A code editor (e.g., Visual Studio Code, Sublime Text)
  • A Ruby on Rails application set up
  • Database configured in your Rails application

Model Creation

In Rails, models are used to represent database tables. To create a model, you can use Rails' built-in generators. For example, to create a `User` model, use the following command:

rails generate model User name:string email:string

This command generates a migration file to create the `users` table with `name` and `email` columns. You can then run the migration with:

rails db:migrate

Using ActiveRecord for CRUD Operations

ActiveRecord simplifies CRUD operations on your models. Here are some common operations:

Create Records

Creating a new user record:

user = 'John', email: '')

Read Records

Fetching users from the database:

users = User.all
first_user = User.first
user = User.find(1)

Update Records

Updating a user's email:

user = User.find(1)
user.update(email: '')

Delete Records

Deleting a user record:

user = User.find(1)

Querying with ActiveRecord

You can use ActiveRecord to perform more advanced queries. For example, finding users with a specific condition:

users = User.where(name: 'John')


ActiveRecord simplifies database operations in Ruby on Rails, making it easier to work with databases in your web applications. By creating models, performing CRUD operations, and utilizing advanced querying capabilities, you can efficiently interact with your database and provide dynamic data-driven features to your users.

As you continue to build Ruby on Rails applications, take advantage of ActiveRecord's powerful features to streamline your database interactions.

Happy coding with ActiveRecord!