Karmen Blake | The Intersection of Art and Technology

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Concepts: ActiveRecord - update attributes RESTful routing - edit/update partials Please view in full screen.

Concepts: New/Create RESTful routes Form Helpers Validations FYI, video looks much better in full-screen.

Concepts: ActiveRecord Basics Migration Basics Creating a controller and a view

Reference: Chapter 4 (The Rails Way) In Rails, by adding map.resources :stories to config/routes.rb , you get 7 predefined routes: stories GET /stories {:controller=>”stories”, :action=>”index”} POST /stories {:controller=>”stories”, :action=>”create”} new_story GET /stories/new {:controller=>”stories”, :action=>”new”} edit_story GET /stories/:id/edit {:controller=>”stories”, :action=>”edit”} story GET /stories/:id {:controller=>”stories”, :action=>”show”} PUT /stories/:id {:controller=>”stories”, :action=>”update”} DELETE /stories/:id {:controller=>”stories”, :action=>”destroy”} Slowly but surely we are going to build an app from the ground up and use all of these RESTful routes. Its very important to understand what each of these do and how to incorporate them into your ...

References Read from: “The Rails Way” – Chapter 6 Active Record Presentation Migrations Presentation (ignore mysql at beginning) Objectives Configure Rails to work with a database (database.yml) create table (migration) use ActiveRecord to interact with our database use script/console to learn how ActiveRecord works Model handle application state (usually in the database) encapsulate business logic, such as data validation and rules applied to data ActiveRecord ORM (object-relational mapping) Instead of dealing with database through SQL statements, ORM layer presents records as a collection of objects Table represents a collection of objects(stories) Record represents an object/model (story) Field represents an object attribute (title) CRUD operations on database C : create, insert record into table R : read, select record(s) from table U : update, update record(s) in the table D : delete, delete record(s) from the table