Question 1

What is ActiveRecord in the context of Ruby on Rails?

Accepted Answer

ActiveRecord is the ORM (Object-Relational Mapping) component of Rails that represents the M (Model) in the MVC pattern. It allows manipulating database data as Ruby objects, establishing a correspondence between SQL tables and Ruby classes, and between columns and object attributes.

Question 2

According to Rails conventions, what is the table name associated with a model named Article?

Accepted Answer

Rails uses a naming convention where the model name is singular and in CamelCase while the table name is plural and in snake_case. Thus, an Article model automatically corresponds to a table named articles. This convention allows Rails to infer associations without explicit configuration.

Question 3

Which Rails command creates a new model with a migration?

Accepted Answer

The rails generate model command (or rails g model for short) simultaneously creates the model file in app/models, the corresponding migration file in db/migrate, and the test files. This ensures that the database structure and the Ruby model remain synchronized from the start.

ActiveRecord Basics

What is ActiveRecord in the context of Ruby on Rails?

Câu trả lời

According to Rails conventions, what is the table name associated with a model named Article?

Câu trả lời

Which Rails command creates a new model with a migration?

Câu trả lời

What is a migration in Rails?

Which command runs all pending migrations?

Các chủ đề phỏng vấn Ruby on Rails khác

Ruby Basics

Ruby Object-Oriented Programming

Rails Fundamentals

Routing & Controllers

Views & ERB Templates

ActiveRecord Associations

Advanced ActiveRecord Queries

Rails Forms

Authentication & Authorization

Modern Asset Pipeline & Frontend

Rails API Mode

Testing with RSpec

ActiveJob & Background Jobs

ActionCable & WebSockets

ActionMailer

ActiveStorage

Caching Strategies

Advanced Migrations

Rails Engines & Modular Apps

Performance Optimization

Rails Design Patterns

Ruby Metaprogramming

Rails Security

GraphQL with Rails

Deployment & Production

Monitoring & Logging

Rails Upgrade Strategies

Nắm vững Ruby on Rails cho lần phỏng vấn tiếp theo