camallen

#Simple form Input class for a hash
class HashInput < SimpleForm::Inputs::Base
  def input
    key = input_html_options.delete(:key)
    #override the params to be in the format that rails will auto correlate back to an
    # attribute hash with key: value
    input_html_options.merge!({:name => "#{self.object_name}[#{attribute_name}][#{key}]"})
    @builder.text_field(attribute_name, input_html_options)
  end
end

camallen

#Simple form Input class for arrays
class ArrayInput < SimpleForm::Inputs::Base
  def input
    #override the attribute name for arrays to allow rails to handle array forms
    input_html_options.merge!({:name => "#{self.object_name}[#{attribute_name}][]"})
    @builder.text_field(attribute_name, input_html_options)
  end
end

camallen

module ExtendFields
  require "yaml"

  private
    def extend_fields
      dynamic_fields.each { |name, type| self.class.field name, type: type }
    end

    def dynamic_fields
      YAML.load_file( File.join( Rails.root, 'config', 'class_fields', "#{self.class.name.underscore}.yml" ) ) rescue {}