Rails MVC, Active Record, routes, migrations, validations, associations, convention over configuration and testing.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What does MVC stand for?
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Model, View, Controller- In Rails MVC, what does a Model represent?
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The data and business logic of the application- In Rails MVC, what does a View represent?
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The user interface displayed to the user- In Rails MVC, what does a Controller do?
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Handles requests, processes data, and returns responses- What is Active Record in Rails?
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An ORM library that maps database tables to Ruby classes- How does Active Record represent database tables?
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Each table is represented by a Ruby class, each row by an object- What command creates a new Rails application?
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rails new [app_name]- What is a Rails generator?
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A command-line tool that creates files and code scaffolding- What is a migration in Rails?
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A reversible version-controlled database schema change- What command creates a migration file?
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rails generate migration [migration_name]- What does 'rails db:migrate' do?
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Executes pending migrations to update the database schema- How do you roll back the last migration in Rails?
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rails db:rollback- What is the purpose of model validation in Rails?
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To ensure data integrity by checking attribute values before saving- What validation checks that an attribute is not blank?
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validates :attribute, presence: true- What validation ensures an attribute value is unique in the database?
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validates :attribute, uniqueness: true
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