DCI Like a BOSS - BostonRB lightning talk

quick talk on DCI for BostonRB lightning talk night.

Transcript

1. DCI
2. Hello There! I’m @patricksroberts. I work at @iorahealth. I co-organize @bostonrb.
3. DATA CONTEXT INTERACTION
4. DCI is a strategy to separate what your system does from what your system is.
5. The Old and Busted Way
6. # app/models/user.rb class User < ActiveRecord::Base validates_presence_of :twitter_handle def tweet TwitterWrangler.add_to_queue twitter_handle, twitter message end private def twitter_message “Today my BMI is #{body_mass_index} and I’m #{percent_of_body_mass_index_goal} from my goal of #{body_mass_index_goal}!” end end
7. THE NEW HOTNESS
8. DATA
9. # app/models/user.rb class User < ActiveRecord::Base validates_presence_of :twitter_handle end
10. ROLE
11. # app/roles/twit_user.rb module TwitUser def twitter_message “Today my BMI is #{body_mass_index} and I’m #{percent_of_body_mass_index_goal} from my goal of #{body_mass_index_goal}!” end end
12. CONTEXT
13. # app/contexts/bmi_update_tweet.rb class BmiUpdateTweet attr_reader :user def initialize(user) @user = user @user.extend TwitUser end def call TwitterWrangler.add_to_queue @user.twitter_handle, @user.twitter_message end end
14. INTERACTION
15. # app/controllers/tweets_controller.rb class TweetsController < ApplicationController def update user = User.find(params[:id]) BmiUpdateTweet.new(user).call respond_with :ok end end