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Contents
# encoding: utf-8
module Mongoid
module Relations
# This module contains the behaviour for handling polymorphic relational
# associations.
module Polymorphic
extend ActiveSupport::Concern
included do
class_attribute :polymorphic
end
module ClassMethods
# Attempts to set up the information needed to handle a polymorphic
# relation, if the metadata checks out.
#
# @example Set up the polymorphic information.
# Movie.polymorph(metadata)
#
# @param [ Metadata ] metadata The relation metadata.
#
# @return [ Class ] The class being set up.
#
# @since 2.0.0.rc.1
def polymorph(metadata)
if metadata.polymorphic?
self.polymorphic = true
if metadata.relation.stores_foreign_key?
field(metadata.inverse_type, type: String)
field(metadata.inverse_of_field, type: Symbol)
end
end
self
end
end
end
end
end
Version data entries
32 entries across 32 versions & 2 rubygems