How to get Materialize CSS radio buttons in platformatec simple form for Rails 4.

_form.html.erb

<!-- In your simple_form use this code but change the column name, collection values, and model reference -->
...
<%= f.input :campaign_type, :label => false, :collection => [['Both Media Types', 'Both Media Types'], ['Just Video', 'Just Video'], ['Just Photo', 'Just Photo']], :label_method => :last, :value_method => :first, :as => :materialize_radio_buttons, :checked => @campaign.campaign_type  %>
...

materialize_radio_buttons_input.rb

class MaterializeRadioButtonsInput < SimpleForm::Inputs::CollectionRadioButtonsInput

  # Creates a radio button set for use with Materialize CSS

  def input(wrapper_options)
    label_method, value_method = detect_collection_methods
    iopts = {
      :item_wrapper_class => 'field',
      :collection_wrapper_class => 'grouped inline fields'
     }
    return @builder.send(
      "collection_radio_buttons",
      attribute_name,
      collection,
      value_method,
      label_method,
      iopts,
      input_html_options,
      &collection_block_for_nested_boolean_style
    )
  end # method

  protected

  def build_nested_boolean_style_item_tag(collection_builder)
    tag = ''
    tag << '<p>'.html_safe
    tag << collection_builder.radio_button + collection_builder.label
    tag << '</p>'.html_safe
    return tag.html_safe
  end # method

end # class

materializeCSS_radio_buttons_rails_4_readme.md

#Get Dogfalo MaterializeCSS radio buttons in Platformatec simple_form.

Just create an inputs folder in your apps root directory.

Place the file there app/inputs/materialize_radio_buttons_input.rb

Use the :as => :materialize_radio_buttons helper in your simple_form input

Thanks for posting this!!!
I can't get the checked option to work. I tried passing just a string with the radio value and still no joy. Any ideas?