simple_form collection wrapper (radios buttons) : double encapsulation of items

Question

I\'d like to reproduce this html sequence of radio buttons with simple_form in order to make simple_form work with http://semantic-ui.com/ syntax :

Answer 1

Summary:

I had done something similar to this before by creating a custom input that inherits from SimpleForm::Inputs::CollectionRadioButtonsInput and overloading just a few methods. For more on custom input components, see https://github.com/plataformatec/simple_form/wiki/Adding-custom-input-components.

In any case, the code below produces your desired html markup almost exactly using simple_form v2.1.0 and rails v3.2.15.

Code:

# File: app/inputs/semantic_ui_radio_buttons_input.rb

class SemanticUiRadioButtonsInput < SimpleForm::Inputs::CollectionRadioButtonsInput

  # Creates a radio button set for use with Semantic UI

  def input
    label_method, value_method = detect_collection_methods
    iopts = { 
      :checked => 1,
      :item_wrapper_tag => 'div',
      :item_wrapper_class => 'field',
      :collection_wrapper_tag => 'div',
      :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 = String.new
    tag << '
'.html_safe
    tag << collection_builder.radio_button + collection_builder.label
    tag << '
'.html_safe
    return tag.html_safe
  end # method

end # class

Then, in your form, just do:

-# File: app/views//_form.html.haml

-# Define the collection
- child_care_coll = %w( Infant Toddler Preschool Kindergarten ).map!.with_index(1).to_a

-# Render the radio inputs
= f.input :child_care_type,
  :collection    => child_care_coll,
  :label_method  => :first,
  :value_method  => :last,
  :as            => :semantic_ui_radio_buttons

Results:

  
    Child care type
  

  


    

      

        
        Infant
      
    

    ...

    

      

        
        Kindergarten