Multi-parameter attributes를 Mongoid 4.0에서 지원시키기

Mongoid 4.0 버전에서 Multi-parameter attributes가 제거되었다고 합니다. (쓰레드 링크)

datetime_select 를 사용 못하게 된겁니다.

그래서 어떤 외국의 능력자 뿐께서 4.0에서도 사용 가능하게 제작하셨습니다.

아래 multi-parameter_attributes_spec.rb multi_parameter_attributes.rb 파일을 lib 폴더에 넣으신 후 애플리케이션 설정에

config.autoload_paths << Rails.root.join('lib')

소스를 추가해 주시면 됩니다.

	# This class is needed since Mongoid doesn't support Multi-parameter
	# attributes in version 4.0 before it's moved to active model in rails 4
	#
	# https://github.com/mongoid/mongoid/issues/2954
	#
	require "spec_helper"
	describe Mongoid::MultiParameterAttributes do
	describe "#process" do
	class Multi
	include Mongoid::Document
	include Mongoid::MultiParameterAttributes
	field :created_at, type: Time
	field :dob, type: Date
	field :checked_at, as: :last_user_checked_at, type: Time
	end
	context "creating a multi" do
	let(:multi) do
	Multi.new(
	"created_at(1i)" => "2010",
	"created_at(2i)" => "8",
	"created_at(3i)" => "12",
	"created_at(4i)" => "15",
	"created_at(5i)" => "45"
	)
	end
	it "sets a multi-parameter Time attribute correctly" do
	multi.created_at.should eq(Time.zone.local(2010, 8, 12, 15, 45))
	end
	it "does not leave ugly attributes on the model" do
	multi.attributes.should_not have_key("created_at(1i)")
	end
	end
	context "creating a multi" do
	context "with a valid DOB" do
	let(:multi) do
	Multi.new({
	"dob(1i)" => "1980",
	"dob(2i)" => "7",
	"dob(3i)" => "27"
	})
	end
	it "sets a multi-parameter Date attribute correctly" do
	multi.dob.should eq(Date.civil(1980, 7, 27))
	end
	end
	context "with an invalid DOB" do
	let(:invalid_multi) do
	Multi.new({
	"dob(1i)" => "1980",
	"dob(2i)" => "2",
	"dob(3i)" => "31"
	})
	end
	it "uses Time's logic to convert the invalid date to valid" do
	invalid_multi.dob.should eq(Time.new(1980, 2, 31).to_date)
	end
	end
	end
	context "with a blank DOB" do
	let(:multi) do
	Multi.new(
	"dob(1i)" => "",
	"dob(2i)" => "",
	"dob(3i)" => ""
	)
	end
	it "generates a nil date" do
	multi.dob.should be_nil
	end
	end
	context "with a partially blank DOB" do
	let(:multi) do
	Multi.new(
	"dob(1i)" => "1980",
	"dob(2i)" => "",
	"dob(3i)" => ""
	)
	end
	it "sets empty date's year" do
	multi.dob.year.should eq(1980)
	end
	it "sets empty date's month" do
	multi.dob.month.should eq(1)
	end
	it "sets empty date's day" do
	multi.dob.day.should eq(1)
	end
	end
	context "with aliased field" do
	let(:multi) do
	Multi.new(
	"last_user_checked_at(1i)" => "2010",
	"last_user_checked_at(2i)" => "8",
	"last_user_checked_at(3i)" => "12",
	"last_user_checked_at(4i)" => "15",
	"last_user_checked_at(5i)" => "45"
	)
	end
	it "sets a multi-parameter Time attribute correctly" do
	multi.last_user_checked_at.should eq(Time.zone.local(2010, 8, 12, 15, 45))
	end
	it "does not leave ugly attributes on the model" do
	multi.attributes.should_not have_key("created_at(1i)")
	end
	end
	end
	end

view raw multi-parameter_attributes_spec.rb hosted with ❤ by GitHub

	# This class is needed since Mongoid doesn't support Multi-parameter
	# attributes in version 4.0 before it's moved to active model in rails 4
	#
	# https://github.com/mongoid/mongoid/issues/2954
	#
	# encoding: utf-8
	module Mongoid
	# Adds Rails' multi-parameter attribute support to Mongoid.
	#
	# @todo: Durran: This module needs an overhaul.
	module MultiParameterAttributes
	module Errors
	# Raised when an error occurred while doing a mass assignment to an
	# attribute through the <tt>attributes=</tt> method. The exception
	# has an +attribute+ property that is the name of the offending attribute.
	class AttributeAssignmentError < Mongoid::Errors::MongoidError
	attr_reader :exception, :attribute
	def initialize(message, exception, attribute)
	@exception = exception
	@attribute = attribute
	@message = message
	end
	end
	# Raised when there are multiple errors while doing a mass assignment
	# through the +attributes+ method. The exception has an +errors+
	# property that contains an array of AttributeAssignmentError
	# objects, each corresponding to the error while assigning to an
	# attribute.
	class MultiparameterAssignmentErrors < Mongoid::Errors::MongoidError
	attr_reader :errors
	def initialize(errors)
	@errors = errors
	end
	end
	end
	# Process the provided attributes casting them to their proper values if a
	# field exists for them on the document. This will be limited to only the
	# attributes provided in the suppied +Hash+ so that no extra nil values get
	# put into the document's attributes.
	#
	# @example Process the attributes.
	# person.process_attributes(:title => "sir", :age => 40)
	#
	# @param [ Hash ] attrs The attributes to set.
	#
	# @since 2.0.0.rc.7
	def process_attributes(attrs = nil)
	if attrs
	errors = []
	attributes = attrs.class.new
	attributes.permit! if attrs.respond_to?(:permitted?) && attrs.permitted?
	multi_parameter_attributes = {}
	attrs.each_pair do |key, value|
	if key =~ /\A([^\(]+)\((\d+)([if])\)$/
	key, index = $1, $2.to_i
	(multi_parameter_attributes[key] ||= {})[index] = value.empty? ? nil : value.send("to_#{$3}")
	else
	attributes[key] = value
	end
	end
	multi_parameter_attributes.each_pair do |key, values|
	begin
	values = (values.keys.min..values.keys.max).map { |i| values[i] }
	field = self.class.fields[database_field_name(key)]
	attributes[key] = instantiate_object(field, values)
	rescue => e
	errors << Errors::AttributeAssignmentError.new(
	"error on assignment #{values.inspect} to #{key}", e, key
	)
	end
	end
	unless errors.empty?
	raise Errors::MultiparameterAssignmentErrors.new(errors),
	"#{errors.size} error(s) on assignment of multiparameter attributes"
	end
	super(attributes)
	else
	super
	end
	end
	protected
	def instantiate_object(field, values_with_empty_parameters)
	return nil if values_with_empty_parameters.all? { |v| v.nil? }
	values = values_with_empty_parameters.collect { |v| v.nil? ? 1 : v }
	klass = field.type
	if klass == DateTime || klass == Date || klass == Time
	field.mongoize(values)
	elsif klass
	klass.new(*values)
	else
	values
	end
	end
	end
	end

view raw multi_parameter_attributes.rb hosted with ❤ by GitHub

	class Project
	include Mongoid::Document
	include Mongoid::MultiParameterAttributes
	field :organization_uid, type: Integer
	field :owner_id, type: Integer
	end

view raw project.rb hosted with ❤ by GitHub

출처: http://roodyruby.tumblr.com/post/67651747866/multi-parameter-attributes-support-for-mongoid-4-0