Developing a GEM for use of Service Objects

#showdev #ruby #rails #gem

Service objects helps to keep your controllers and models slim and readable

Simple example

Before

# app/controllers/post_releases_controller.rb
class PostReleasesController < ApplicationController

  # [...]

  def update
    @post.prepare_to_release                      # <--
    if @post.update(released_at: Date.current)    # <--
      redirect_to root_path
    else
      render :edit
    end
  end

  # [...]

end

After

# app/controllers/post_releases_controller.rb
class PostReleasesController < ApplicationController

  # [...]

  def update
    if ReleasePost.call(post: @post)    # <--
      redirect_to root_path
    else
      render :edit
    end
  end

  # [...]

end

# app/services/release_post.rb
class ReleasePost < ServiceIt::Base
  def perform
    @post.prepare_to_release
    @post.update(released_at: Date.current)
  end
end