Topics

• Arrays
• Routing
• Control Flow
• ActiveRecord
• ActiveRecord Migrations
• ActiveRecord Query Interface
• I18n - Internationalization
• ActionController

Examples

• Resource Routing (Basic)
• if, elsif, else and end
• Creating A Migration
• Add a new column to a table
• Adding multiple columns to a table
• Running migrations
• Rollback migrations
• .where
• .where with an array
• Output JSON instead of HTML
• Controllers (Basic)
• Parameters
• Filtering parameters (Basic)
• Redirecting
• Using Views
• 404 when record not found
• Basic REST Controller
• Display error pages for exceptions
• Redo migrations
• Ordering
• ActiveRecord Bang (!) methods
• .find_by
• .delete_all
• Use I18n in views
• I18n with arguments
• Pluralization
• Set locale through requests
• Turn multi-dimensional array into a one-dimensional (flattened) array
• Get unique array elements
• Forbid null values
• Get locale from HTTP request
• Filters
• Generating a controller
• Rescuing ActiveRecord::RecordNotFound with redirect_to
• Translating ActiveRecord model attributes
• Ternary operator