Add accepts_embedded_resources_for to Mongoid::NestedAttributes

mongoid-accepts_embedded_resource_for.gemspec

Gem::Specification.new do |s|
  s.name        = 'mongoid-accepts_embedded_resource_for'
  s.version     = '0.1.0'
  s.platform    = Gem::Platform::RUBY
  s.author      = 'John Bintz'
  s.email       = '[email protected]'
  s.summary     = 'Add accepts_embedded_resources_for to Mongoid::NestedAttributes, so it plays nicer with Carrierwave and embedded documents'
  s.description = 'Add accepts_embedded_resources_for to Mongoid::NestedAttributes, so it plays nicer with Carrierwave and embedded documents'

  s.files         = ['mongoid-accepts_embedded_resource_for.rb']
  s.require_path  = '.'
  s.add_dependency 'mongoid'
end

mongoid-accepts_embedded_resource_for.rb

require 'mongoid'
require 'mongoid/nested_attributes'

module Mongoid
  module NestedAttributes
    module ClassMethods
      def accepts_embedded_attributes_for(*args)
        options = {}
        if args.last.kind_of?(::Hash)
          options = args.pop
        end

        accepts_nested_attributes_for(*args, options)

        args.each do |column|
          class_eval <<-RB
            alias :original_#{column}_attributes= :#{column}_attributes=

            def #{column}_attributes=(*args)
              send("original_#{column}_attributes=", *args)

              #{column}.each(&:save!)
            end
          RB
        end
      end
    end
  end
end