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Contents
# encoding: utf-8
module Mongoid #:nodoc:
module Associations #:nodoc:
class BelongsToRelated #:nodoc:
include Proxy
attr_reader :document, :options
# Initializing a related association only requires looking up the object
# by its id.
#
# Options:
#
# document: The +Document+ that contains the relationship.
# options: The association +Options+.
def initialize(document, foreign_key, options)
@document = options.klass.find(foreign_key)
end
# Delegate all missing methods over to the +Document+.
def method_missing(name, *args)
@document.send(name, *args)
end
class << self
# Instantiate a new +BelongsToRelated+ or return nil if the foreign key is
# nil. It is preferrable to use this method over the traditional call
# to new.
#
# Options:
#
# document: The +Document+ that contains the relationship.
# options: The association +Options+.
def instantiate(document, options)
foreign_key = document.send(options.foreign_key)
foreign_key.blank? ? nil : new(document, foreign_key, options)
end
# Returns the macro used to create the association.
def macro
:belongs_to_related
end
# Perform an update of the relationship of the parent and child. This
# will assimilate the child +Document+ into the parent's object graph.
#
# Options:
#
# related: The related object
# parent: The parent +Document+ to update.
# options: The association +Options+
#
# Example:
#
# <tt>BelongsToRelated.update(game, person, options)</tt>
def update(related, parent, options)
parent.send("#{options.foreign_key}=", related.id) if related
related
end
end
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems