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Reinvesting in Ruby RubyConf AU 2017

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Hello!

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@timriley

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Present Ruby Different Ruby Future Ruby

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Present Ruby

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We’ve come a long way

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Rails 1.0: Party like it's one oh oh! Posted by David December 13, 2005 @ 09:02 PM

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Ruby 2.4.0 released (ruby-lang.org) 1. Android adopts JRuby: “It’s Java without the Java” (android.com) 2. Why Atom chose Ruby (atom.io) 3. Rubocop saved my life (medium.com) 4.

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rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new rails new

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Nope

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Challenges

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Competition

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Competition

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Consolidation

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Transition

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@timriley I have just realised I do not remember the last ruby I wrote — @johnbarton

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Complacency

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Tools

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Culture

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Ruby has real worth

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Open source communities are non-exclusive

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Open source communities are like sharks; they need to keep moving forward. — Matz

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Reconsider Ruby

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Ruby moves slowly

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We’ll all get nice improvements, eventually

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Ruby is ours

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Ruby evolves

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Ruby is evolving

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Different Ruby

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dry-rb

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Code time!

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Functional Ruby

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Functions as values Immutability Avoid side effects

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Functional objects

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class CreateArticle def call(input) output = some_action output end end

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class CreateArticle def call(input) output = some_action output end end

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Separate data from behaviour

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class CreateArticle attr_reader :repo def initialize(repo) @repo = repo end def call(input) repo.create(input) end end

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# Initialize once create_article = CreateArticle.new(repo) # Reuse many times create_article.(title: "Hello Melbourne") create_article.(title: "Hello World!”)

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# Initialize once create_article = CreateArticle.new(repo) # Reuse many times create_article.(title: "Hello Melbourne") create_article.(title: "Hello World!”)

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12 gems, 15 minutes, 1 blog.

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One stack of many

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GET /articles

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Routing & HTTP Object dependency management Views Data modelling 1 2 3 4

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Routing & HTTP dry-web-roda GET /articles 1

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Routing & HTTP dry-web + roda GET /articles 1

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$ gem install dry-web-roda $ dry-web-roda new blog

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$ gem install dry-web-roda $ dry-web-roda new blog

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. ├── Gemfile ├── README.md ├── Rakefile ├── apps │ └── main │ ├── lib │ │ └── main │ │ └── views │ │ └── welcome.rb │ ├── system │ │ ├── boot │ │ │ └── view.rb │ │ ├── boot.rb │ │ └── main │ │ ├── application.rb │ │ ├── container.rb │ │ ├── import.rb │ │ ├── transactions.rb │ │ ├── view_context.rb │ │ └── view_controller.rb

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class Blog::Application < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end end end

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class Blog::Application < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end end end

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class Blog::Application < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end end end

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Object dependency management dry-system GET /articles 2

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r.view "articles.index" Blog::Container["views.articles.index"] # # lib/blog/views/articles/index.rb

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r.view "articles.index" Blog::Container["views.articles.index"] # # lib/blog/views/articles/index.rb

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r.view "articles.index" Blog::Container["views.articles.index"] # # lib/blog/views/articles/index.rb

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r.view "articles.index" Blog::Container["views.articles.index"] # # lib/blog/views/articles/index.rb

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require $LOAD_PATH

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Views dry-view GET /articles 3

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class Index < Blog::ViewController configure do |config| config.template = "articles/index" end end

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class Index < Blog::ViewController configure do |config| config.template = "articles/index" end end

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Object dependency management dry-auto_inject GET /articles 2

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class Index < Blog::ViewController configure do |config| config.template = "articles/index" end include Blog::Import[repo: "blog.repositories.articles"] expose :articles do repository.listing end end

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class Index < Blog::ViewController configure do |config| config.template = "articles/index" end include Blog::Import[repo: "repositories.articles"] expose :articles do repository.listing end end

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class Index < Blog::ViewController configure do |config| config.template = "articles/index" end include Blog::Import[repo: "repositories.articles"] expose :articles do repo.listing end end

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Data modelling dry-types & dry-struct GET /articles 4

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class Article < Dry::Struct attribute :title, Types::Strict::String attribute :body, Types::Strict::String attribute :published_at, Types::Strict::Time end

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class Article < Dry::Struct attribute :title, Types::Strict::String attribute :body, Types::Strict::String attribute :published_at, Types::Strict::Time end

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class Article < Dry::Struct attribute :title, Types::Strict::String attribute :body, Types::Strict::String attribute :published_at, Types::Strict::Time end

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ol - articles.each do |article| li = article.title r.view “articles.index”
  1. Hello Melbourne
  2. Hello World

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ol - articles.each do |article| li = article.title r.view "articles.index"
  1. Hello Melbourne
  2. Hello World

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ol - articles.each do |article| li = article.title r.view "articles.index"
  1. Hello Melbourne
  2. Hello World

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ol - articles.each do |article| li = article.title r.view "articles.index"
  1. Hello Melbourne
  2. Hello World

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ol - articles.each do |article| li = article.title Blog::Container["views.articles.index"].()
  1. Hello Melbourne
  2. Hello World

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class Blog < Dry::Web::Application route do |r| r.get "articles" do r.view "articles.index" end end end

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GET /articles

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Routing & HTTP dry-web-roda Object dependency management dry-system & dry-auto_inject Views dry-view Data modelling dry-types & dry-struct 1 2 3 4

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POST /articles

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Validation Success & error handling 1 2

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class MyApp < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end r.post "articles" do r.resolve "operations.create_article" do |create| create.(r[:article]) end end end end

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class MyApp < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end r.post "articles" do r.resolve "operations.create_article" do |create| create.(r[:article]) end end end end

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class MyApp < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end r.post "articles" do r.resolve "operations.create_article" do |create| create.(r[:article]) end end end end

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class MyApp < Dry::Web::Roda::Application route do |r| r.get "articles" do r.view "articles.index" end r.post "articles" do r.resolve "operations.create_article" do |create| create.(r[:article]) end end end end

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r.resolve "operations.create_article" Blog::Container["operations.create_article"] # # lib/blog/operations/create_article.rb

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r.resolve "operations.create_article" Blog::Container["operations.create_article"] # # lib/blog/operations/create_article.rb

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r.resolve "operations.create_article" Blog::Container["operations.create_article"] # # lib/blog/operations/create_article.rb

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r.resolve "operations.create_article" Blog::Container["operations.create_article"] # # lib/blog/operations/create_article.rb

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class CreateArticle def call(input) result = Validation::ArticleSchema.(input) end end

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class CreateArticle def call(input) result = Validation::ArticleSchema.(input) end end

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Validation dry-validation POST /articles 1

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module Validation ArticleSchema = Dry::Validation.Form do required(:title).filled(min_size?: 3) required(:body).filled required(:published).filled(:bool?) required(:published_at).filled(:time?) end end

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module Validation ArticleSchema = Dry::Validation.Form do required(:title).filled(min_size?: 3) required(:body).filled required(:published).filled(:bool?) required(:published_at).filled(:time?) end end

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module Validation ArticleSchema = Dry::Validation.Form do required(:title).filled(min_size?: 3) required(:body).filled required(:published).filled(:bool?) required(:published_at).filled(:time?) end end

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module Validation ArticleSchema = Dry::Validation.Form do required(:title).filled(min_size?: 3) required(:body).filled required(:published).filled(:bool?) required(:published_at).filled(:time?) end end

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module Validation ArticleSchema = Dry::Validation.Form do required(:title).filled(min_size?: 3) required(:body).filled required(:published).filled(:bool?) required(:published_at).filled(:time?) end end

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input = { "title" => "Hello Melbourne", "body" => "Why I always forget my umbrella", "published" => "1", "published_at" => "2017-02-09 09:50" } ArticleSchema.(input).to_h { title: "Hello Melbourne", body: "Why I always forget my umbrella" published: true, published_at: 2017-02-09 09:50:00 +1100 }

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input = { "title" => "Hello Melbourne", "body" => "Why I always forget my umbrella", "published" => "1", "published_at" => "2017-02-09 09:50" } ArticleSchema.(input).to_h { title: "Hello Melbourne", body: "Why I always forget my umbrella" published: true, published_at: 2017-02-09 09:50:00 +1100 }

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input = { "title" => "Hello Melbourne", "body" => "Why I always forget my umbrella", "published" => "1", "published_at" => "2017-02-09 09:50" } ArticleSchema.(input).to_h { title: "Hello Melbourne", body: "Why I always forget my umbrella" published: true, published_at: 2017-02-09 09:50:00 +1100 }

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input = { "title" => "Hello Melbourne", "body" => "Why I always forget my umbrella", "published" => "1", "published_at" => "2017-02-09 09:50" } ArticleSchema.(input).to_h { title: "Hello Melbourne", body: "Why I always forget my umbrella" published: true, published_at: 2017-02-09 09:50:00 +1100 }

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input = { "title" => "Hello Melbourne", "body" => "Why I always forget my umbrella", "published" => "1", "published_at" => "2017-02-09 09:50" } ArticleSchema.(input).to_h { title: "Hello Melbourne", body: "Why I always forget my umbrella" published: true, published_at: 2017-02-09 09:50:00 +1100 }

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ArticleSchema.("published" => "1").messages { :title => [ "is missing", "size cannot be less than 3"], :body => ["is missing"], :published_at => ["is missing"] }

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ArticleSchema.("published" => "1").messages { :title => [ "is missing", "size cannot be less than 3"], :body => ["is missing"], :published_at => ["is missing"] }

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class CreateArticle include Blog::Import[repo: "repositories.articles"] def call(input) validation = Validation::ArticleSchema.(input) if validation.success? result = repo.create(validation) Article.new(result) end end end

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class CreateArticle include Blog::Import[repo: "repositories.articles"] def call(input) validation = Validation::ArticleSchema.(input) if validation.success? repo.create(validation) end end end

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class CreateArticle include Blog::Import[repo: "repositories.articles"] def call(input) validation = Validation::ArticleSchema.(input) if validation.success? repo.create(validation) end end end

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Success & failure handling dry-monads & dry-matcher POST /articles 2

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def call(input) validation = Validation::ArticleSchema.(input) if validation.success? result = articles.create(validation) Right(result) end end

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def call(input) validation = Validation::ArticleSchema.(input) if validation.success? result = articles.create(validation) Right(result) end end

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def call(input) validation = Validation::ArticleSchema.(input) if validation.success? result = articles.create(validation) Right(result) else Left(validation) end end

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r.post do r.resolve "operations.create_article" do |create| create.(r[:article]) m.success do r.redirect "/articles" end m.failure do |validation| r.view "articles.new", validation: validation end end end end

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r.post do r.resolve "operations.create_article" do |create| create.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure do |validation| r.view "articles.new", validation: validation end end end end

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r.post do r.resolve "operations.create_article" do |create| create.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure do |validation| r.view "articles.new", validation: validation end end end end

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r.post do r.resolve "operations.create_article" do |create| create.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure do |validation| r.view "articles.new", validation: validation end end end end

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r.post do r.resolve "operations.create_article" do |create| create.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure do |validation| r.view "articles.new", validation: validation end end end end

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POST /articles

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Validation dry-validation Success & error handling dry-monads & dry-matcher 1 2

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dry-rb

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dry-rb

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Change

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New feature Email articles to subscribers

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dry-transaction

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Blog::Transactions.define do |t| t.define "transactions.create_article" do step :create, with: "operations.create_article" step :notify, with: "operations.notify_subscribers" end end

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Blog::Transactions.define do |t| t.define "transactions.create_article" do step :create, with: "operations.create_article" step :notify, with: "operations.notify_subscribers" end end

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Blog::Transactions.define do |t| t.define "transactions.create_article" do step :create, with: "operations.create_article" step :notify, with: "operations.notify_subscribers" end end

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Blog::Transactions.define do |t| t.define "transactions.create_article" do step :create, with: "operations.create_article" step :notify, with: "operations.notify_subscribers" end end

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create_article.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure :create do |errors| r.view "articles.new", validation: errors end m.failure :notify do |error| # ... end end

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create_article.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure :create do |errors| r.view "articles.new", validation: errors end m.failure :notify do |error| # ... end end

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create_article.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure :create do |errors| r.view "articles.new", validation: errors end m.failure :notify do |error| # ... end end

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create_article.(r[:article]) do |m| m.success do r.redirect "/articles" end m.failure :create do |errors| r.view "articles.new", validation: errors end m.failure :notify do |error| # ... end end

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Change

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Isolated testing

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Simplicity

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Clear separation of concerns

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Clear flow of data

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Design around boundaries

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rom-rb

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Design for the domain

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Ruby, melting pot

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A new kind of Ruby

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A change-positive architecture

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A change-positive app is maintainable

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A change-positive app is sustainable

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A change-positive app is joyful

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dry-rb

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dry-rb Icelab

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Levelling up

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Look Sandi Metz in the eye again

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Levelling up

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Better developers, better executing team

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Ship without guilt

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This is our future Ruby

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Future Ruby
 for small teams

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Future Ruby
 for large organisations

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Let's say every company gets three innovation tokens. You can spend these however you want, but the supply is fixed. — Dan McKinley

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Optimize globally

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Deliver faster

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Future Ruby
 for learners

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Future Ruby
 for learners

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Future Ruby
 in OSS

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Hanami

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Hanami dry-validation &
 rom-rb

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Trailblazer dry-validation &
 dry-container/auto_inject

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More to Ruby than you think

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A healthy future for Ruby is diverse

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if not us then "who?" end

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Curiosity

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Criticism

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Cooperation

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Cooperation

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Celebration

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Curiosity Criticism Cooperation Celebration!

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Reinvest in Ruby

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Thank you!