Explain what is Rails Active Record in Ruby on Rails?

Active Record in Ruby on Rails

Active Record is an Object-Relational Mapping (ORM) library that is part of the Ruby on Rails web framework. It provides an abstraction layer between the Ruby code and the underlying database, allowing developers to interact with the database using Ruby objects and methods instead of writing raw SQL queries.

Active Record follows the Active Record pattern, which is a design pattern that maps database tables to Ruby classes. Each table in the database corresponds to a model class in the Rails application, and each row in the table corresponds to an instance of that class.

Here are some key features and benefits of Active Record:

Database Abstraction

Active Record provides a consistent API for interacting with different database systems, such as MySQL, PostgreSQL, SQLite, and Oracle. This allows developers to write database-agnostic code and easily switch between different databases without modifying the application logic.

Model Validation

Active Record provides built-in support for validating model attributes, ensuring that data stored in the database meets specific criteria. This helps maintain data integrity and reduces the likelihood of errors.

Associations

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