ActiveRecord Basics
Models, migrations, CRUD operations, validations, callbacks, scopes
1What is ActiveRecord in the context of Ruby on Rails?
What is ActiveRecord in the context of Ruby on Rails?
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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.
2According to Rails conventions, what is the table name associated with a model named Article?
According to Rails conventions, what is the table name associated with a model named Article?
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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.
3Which Rails command creates a new model with a migration?
Which Rails command creates a new model with a migration?
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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.
What is a migration in Rails?
Which command runs all pending migrations?
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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
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