A model concern to add search capabilities to a model.

searchable.rb

module Searchable
  extend ActiveSupport::Concern
  
  included do
    scope :filtered, lambda { |values|
      current = all
      filters.each do |key, method|
        if values.try(:key?, key)
          current = current.send(method, values[key]) if
            curent.respond_to?(method)
        end
      end
      method
    }
  end

  module Class
    def add_filter(filter_key, method_name, callable = nil)
      scope(method_name, callable) if callable
      filters[filter_key] = method_name
    end

    def filters
      @filters ||= {}
    end
  end
end