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# encoding: UTF-8
module MongoMapper
module Plugins
module Associations
extend ActiveSupport::Concern
module ClassMethods
def inherited(subclass)
subclass.associations = associations.dup
super
end
def belongs_to(association_id, options={}, &extension)
create_association(BelongsToAssociation.new(association_id, options, &extension))
end
def many(association_id, options={}, &extension)
create_association(ManyAssociation.new(association_id, options, &extension))
end
def one(association_id, options={}, &extension)
create_association(OneAssociation.new(association_id, options, &extension))
end
def associations
@associations ||= {}
end
def associations=(hash)
@embedded_associations = nil
@associations = hash
end
def embedded_associations
@embedded_associations ||= associations.values.select { |assoc| assoc.embeddable? }
end
def associations_module_defined?
# :nocov:
if method(:const_defined?).arity == 1 # Ruby 1.9 compat check
const_defined?('MongoMapperAssociations')
else
const_defined?('MongoMapperAssociations', false)
end
# :nocov:
end
def associations_module
if associations_module_defined?
const_get 'MongoMapperAssociations'
else
Module.new.tap do |m|
const_set 'MongoMapperAssociations', m
include m
end
end
end
private
def create_association(association)
@embedded_associations = nil
associations[association.name] = association
association.setup(self)
end
end
def associations
self.class.associations
end
def embedded_associations
self.class.embedded_associations
end
def build_proxy(association)
proxy = association.proxy_class.new(self, association)
self.instance_variable_set(association.ivar, proxy)
proxy
end
def get_proxy(association)
proxy = self.instance_variable_get(association.ivar) if instance_variable_defined?(association.ivar)
proxy ||= build_proxy(association)
end
def save_to_collection(options={})
super if defined?(super)
associations.each do |association_name, association|
proxy = get_proxy(association)
proxy.save_to_collection(options) if proxy.proxy_respond_to?(:save_to_collection) && association.autosave?
end
end
end
end
end