app/models/continent_model.rb
class ContinentModel < ActiveRecord::Base
worldwise
attr_accessible :code, :name, :description, :continent_ids, :translations_attributes
translates :name, :description, fallbacks_for_empty_translations: true
validates :code, presence: true, uniqueness: true
validates :name, presence: true, uniqueness: true
validates :description, presence: true
has_and_belongs_to_many :continents
accepts_nested_attributes_for :translations
end