ActiveRecord Internals - EmpanadaRecord - Medellin.rb

ActiveRecord Internals talk on Medellin.rb meetup http://www.meetup.com/medellin-rb/

Transcript

1. Medellín.rb ActiveRecord Internals @RubyMedellin http://medellinrb.org
2. Schedule - Say Hi - Active Record Pattern - ActiveRecord (Rails) - Yummy yummy - Code Kata @RubyMedellin http://medellinrb.org
3. PEAA http://www.amazon.com/Patterns-Enterprise-Application-Architecture- Martin/dp/0321127420
4. GoF http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612/
5. Ruby Patterns http://www.amazon.com/Design-Patterns-Ruby-Russ-Olsen/dp/0321490452/
6. Active Record Pattern An object that wraps a row in a database table or view, encapsulates the database access, and adds domain logic on that data. http://www.martinfowler.com/eaaCatalog/activeRecord.html
7. ActiveRecord (Rails) Active Record facilitates the creation and use of business objects whose data requires persistent storage to a database. It is an implementation of the Active Record pattern which itself is a description of an Object Relational Mapping system. http://guides.rubyonrails.org/active_record_basics.html
8. ActiveRecord (Rails) - ActiveModel - Migrations - Adapters - Validations - Callbacks - etc http://guides.rubyonrails.org/active_record_basics.html
9. ActiveRecord (Rails) class Product < ActiveRecord::Base # ... end Product.first Product.where(name: ‘LCD TV’) http://guides.rubyonrails.org class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.text :description t.timestamps null: false end end end
10. DEMO Code will be uploaded to: https://github.com/medellinrb/activerecord-internals
11. Yummy yummy
12. Code Kata
13. Code Kata Kata (型 or 形 literally: "form"?), a Japanese word, are the detailed choreographed patterns of movements practised either solo or in pairs. A code kata is an exercise in programming which helps a programmer hone their skills through practice and repetition. http://en.wikipedia.org/wiki/Kata_(programming) - http://en.wikipedia.org/wiki/Kata
14. Today’s Kata Implement: SomeModel.first SomeModel.all SomeModel.count SomeModel.find_by_name(‘given name’) SomeModel.find_by_whateverattribute(‘xxx’) SomeModel.where(attr: ‘value’) Improve multiple DB adapters Improve setup/teardown on tests
15. Thanks <3 Medellín.rb @RubyMedellin http://medellinrb.org