simple_form input builder for use with my mongoid_taggable fork

tags_input.rb

# Example simple_form input builder to render tags from an Array field,
# for use with my fork of mongoid_taggable:
# 
#   https://github.com/ches/mongoid_taggable
#
# Once you've configured your app to load this, use it in forms thusly:
#
#   <%= f.input :tags, :as => :tags %>
#
module SimpleForm
  module Inputs
    class TagsInput < StringInput

    protected
      def html_options_for(namespace, extra)
        formatted_tags = object.send("#{attribute_name}").
                         try(:join, "#{object.send(:tags_separator)} ")
        super.merge(:value => formatted_tags)
      end

    end
  end
end