Topics

• Getting started with Ruby on Rails
• Routing
• ActiveRecord
• ActiveRecord Migrations
• Rails Best Practices
• ActiveModel
• ActiveRecord Validations
• ActiveRecord Query Interface
• ActionMailer
• Rails generate commands
• ActionController
• ActiveRecord Locking
• Debugging
• Rails API
• ActiveSupport
• ActiveRecord Transactions
• Decorator pattern
• ActiveRecord Transactions

Examples

• Run specific migration
• .where
• .where with an array
• Scopes
• where.not
• Using ActiveModel::Validations
• URL params with a period
• 404 when record not found
• Skipping Validations
• Rails Generate Migration
• .find_by
• Using a model instance to update a row
• Conditional validation
• Core Extensions: String Access
• Core Extensions: String to Date/Time Conversion
• Core Extensions: String Exclusion
• Core Extensions: String Filters
• Core Extensions: String Inflection
• Adding a NOT NULL constraint to existing data
• Different ActiveRecord classes in a single transaction
• Multiple database connections
• save and destroy are automatically wrapped in a transaction
• Callbacks
• Rolling back a transaction
• Beware of default_scope
• Decorating a Model using SimpleDelegator
• Decorating a Model using Draper
• Domain Objects (No More Fat Models)