diary of a mad rails engineer

Presenter: Real name, Akira Matsuda, @a_matsuda

Bio

Akira Matsuda

Abstract

Summary

Memorable Quotes

• You can't call yourself an engineer if you are not working on engines.
• Rails plugin is a Gem

Notes

• Engine is a Rails plugin

Create Rails engine step by step

# Specify gemspec
Gem::Specification.new do |s|
  s.version = 0.0.1
  s.name = "name"
  s.file_name = 'something'
end

> rails r

# Adding Railtie class, to register initializer
module MyModule
  class Railtle < ::Rails::Railtie
    initializer 'lsrc.init' do
      puts 'initialzier'
    end
  end
end

Rails engine

An engine can contain models, controllers, views, routes, etc.

module MyModule
  class MyEngine < ::Rails::Engine
  end
end

Engine can contain modules

class Foo
  def foo
  end
end

all models inside engine are loaded to $LOAD_PATH

What can engines do

• Rails Engine can contain app, views, controllers

Mountable engines (resolve routes conflict between the main_app and the engine)

• The problem: constants, routes, helpers often conflicts between main_app
• Entity Relation Document, pretty hot
• Roundabout, pretty hot
• hocus_pocus, generates cucumber specs by recording your browser

Discussion

External Links