Creating Layers
Creating Layers
0 0
presentation-rails-layers
my presentation for MountainWestRuby conf 2014On Github hqmq / presentation-rails-layers
Creating Layers
Michael Ries
Twitter @hqmq_
Github @hqmq
Component-based Architectures in Ruby and Rails
By Stephan Hagemann
http://www.confreaks.com/videos/2350-mwrc2013-component-based-architectures-in-ruby-and-rails
Make Boxes
By Stephan Hagemann
http://www.confreaks.com/videos/2350-mwrc2013-component-based-architectures-in-ruby-and-rails
Stephen's List
One App Modules Gems => Local Gems Rails Engines Looser Coupling => Domain Objects Services => Service Objects eco-system => Published Gems HTTP SOA Gems => Local Gems Looser Coupling => Domain Objects => Narrow API Services => Service Objects Eco-System => Published Gem => Collection of Gems/Libraries useful across applicationsLayer
Box + Direction
Definition: A Layer is a box with directional dependency.Example 1
New Feature
If you are thinking about changing the structure of an application it is often easier to try it out on a new feature than than refactoring an existing feature.Example 1
Persisted Course Records
Protip: Pick a slice as small as possible.
class CreateCourseRecords < ActiveRecord::Migration
...
end
So what would it take to make it work within our application? A Migration...
class CourseRecord < ActiveRecord::Base
...
end
A model
module UpdateCourseRecordsOnCreate
extend ActiveSupport::Concern
included do
after_save :recalculate_records
end
end
Some sort of observer to recalculate records when new games are created.
require 'sinatra'
post '/game.json' do
...calculate records...
end
get '/:course_id/records.json' do
end
So what would it take to make it work as a new service? A Sinatra app...