Shelby's Presenter example

pokemon_decorator.rb

class PokemonDecorator < Draper::Decorator
  def squirtle_scope
    h.select_tag("shell", colors(current), class: "squirtlicious")
  end
 
  def colors(current)
    current = 1
    h.options_for_select({
      "Blue" => 1,
      "Green" => 2,
      "Yellow" => 3
    }, selected: current)
  end
end

squirtles_controller.rb

class SquirtlesController < ApplicationController
  has_scope :shell do |scope, value|
    (value == 'all') ? scope : scope.where(shell: value)
  end
end

squirtlicious.scss

.squirtlicious {
  select { width: 10em; }
}

view.haml

.div.squirtlicious
  = pokemon.decorate.squirtle_scope
%table
  %tbody
    - @squirtles.each do |s|
      %tr
        %td= s.shell
        %td= s.name
        %td= s.catch_rate