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# encoding: utf-8
module Mongoid #:nodoc:
# Mongoid's implementation of Rails' nested attributes.
module NestedAttributes
extend ActiveSupport::Concern
included do
class_attribute :nested_attributes
self.nested_attributes = []
end
module ClassMethods #:nodoc:
REJECT_ALL_BLANK_PROC = proc { |attributes| attributes.all? { |key, value| key == '_destroy' || value.blank? } }
# Used when needing to update related models from a parent relation. Can
# be used on embedded or referenced relations.
#
# @example Defining nested attributes.
#
# class Person
# include Mongoid::Document
#
# embeds_many :addresses
# embeds_one :game
# references_many :posts
#
# accepts_nested_attributes_for :addresses, :game, :posts
# end
#
# @param [ Array<Symbol>, Hash ] *args A list of relation names, followed
# by a hash of options.
#
# @option *args [ true, false ] :allow_destroy Can deletion occur?
# @option *args [ Proc, Symbol ] :reject_if Block or symbol pointing to a class method to reject documents with.
# @option *args [ Integer ] :limit The max number to create.
# @option *args [ true, false ] :update_only Only update existing docs.
def accepts_nested_attributes_for(*args)
options = args.extract_options!
options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank
args.each do |name|
self.nested_attributes += [ "#{name}_attributes=" ]
define_method("#{name}_attributes=") do |attrs|
_assigning do
relation = relations[name.to_s]
relation.nested_builder(attrs, options).build(self)
end
end
end
end
end
end
end
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105 entries across 59 versions & 2 rubygems