Using embedded documents to store field data

field.rb

class Field
  include MongoMapper::EmbeddedDocument

  key :name,            String
  key :label,           String,  :required => true
  key :helper_text,     String
  key :required,        Boolean, :default => false
  key :widget,          String,  :required => true
  key :options,         Array    # => [[value, label], [value, label], [value, label]]
  key :selected,        String
  key :word_limit,      Integer, :default => 0
  key :position,        Integer, :default => 0
  key :form_id,         BSON::ObjectID

  belongs_to :form
end

form.rb

class Form
  include MongoMapper::Document
  key :name,                      String, :required => true, :unique => true
  # additional fields for the form...
  many :fields, :order => 'position'
end