1. Octocat
?
2018/07/13 @treby006
Rails Developers Meetup Day3

2. • treby (@treby006) Shinjuku.rb
• Repro Dev2
• Rails
• Rails, Vue.js, AWS(ECS, EMR), Go

3. Repro
• Rails
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4. Repro
• Rails
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5. Commit 2

6. Additions/Deletions 1
( )

7. Repro
• Rails
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• CTO Contribute

8. Repro

9. We are hiring!!
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• / B to B
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• Conference

11. :

12. : Technical debt
(design debt)
---- Wikipedia

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• =>
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20. (Rails )

21. 1
DSL/
class SomeDSL
def self.configulation(*args)
end
module Definition
def provide(&definition)
end
end
:
:
end

22. DSL/
• 0 → 1
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……

23. DSL/
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• DSL/

24. DSL/
• Ruby
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• gem OSS

25. 2
class SomeController < ApplicationController
:
:
def create
@presenter = SomePresenter.new(@some_model)
if @presenter.save
redirect_to :some_path
else
render :new
end
end
end

26. 2
class SomePresenter < PresenterBase
attr_reader :form
delegate :save, to: :form
def initialize(some_model)
@form = SomeForm.new(some_model.attributes, self)
end
:
:
end

27. 2
class SomeForm < FormBase
validate :something
:
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def initialize(params)
:
:
end
end

28. •
• Rails
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• ……

29. SomeForm : Before
class SomeForm < FormBase
validate :something
:
:
def initialize(params)
:
:
end
end

30. SomeForm : After
class SomeForm < FormBase
validate :something
:
:
attr_reader :presenter
def initialize(params, presenter)
:
@presenter = presenter
:
end
def validate
presenter.some_methods
super
end
end

31. Presenter : Before
class SomePresenter < PresenterBase
attr_reader :form
delegate :save, to: :form
def initialize(some_model)
@form = SomeForm.new(some_model.attributes, self)
end
:
:
end

32. Presenter : After
class SomePresenter < PresenterBase
attr_reader :form
def initialize(some_model)
@form = SomeForm.new(some_model.attributes, self)
end
def save
:
@form.save
:
end
:
:
end

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35. • CI
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37. •
• →
• →
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• =>
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40. :

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52. https://speakerdeck.com/joker1007/realworld-
domain-model-on-rails

53. https://speakerdeck.com/joker1007/realworld-
domain-model-on-rails

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55. • Rails
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• CoC (Convention over Configuration)
• Rails Rails
( )
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• :
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59. !

60. !

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• ……

63. We are hiring!!
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• / B to B
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•
•
• Conference

64. Repro Tech Meetup
https://repro-tech.connpass.com/event/94282/

65. Happy Hacking!!

66. :