Rails 4.0 Strong Parameters nested attributes with a key that points to a hash

Question

I was playing around with Rails 4.x beta and trying to get nested attributes working with carrierwave. Not sure if what I\'m doing is the right direction. After searching

Answer 1

Sanitize before save in controller Sanitize accepts_nested_attributes_for attributes with index.

before_action :sanitize_fields_params, :only => [:create, :update]

def sanitize_fields_params

    product_free_shippings_attributes = params[:product][:product_free_shippings_attributes]

    product_free_shippings_attributes.each do |index, key_value|
      params[:product][:product_free_shippings_attributes]["#{index}"][:weight] = clear_decimal(key_value[:weight])
      params[:product][:product_free_shippings_attributes]["#{index}"][:height] = clear_decimal(key_value[:height])
      params[:product][:product_free_shippings_attributes]["#{index}"][:width] = clear_decimal(key_value[:width])
      params[:product][:product_free_shippings_attributes]["#{index}"][:depth] = clear_decimal(key_value[:depth])
    end
 end

 def clear_decimal(field) 
    return (field.to_s.gsub(/[^\d]/, '').to_d / 100.to_d) unless field.blank?
  end