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Contents
# encoding: utf-8
require "mongoid/relations/cascading/strategy"
require "mongoid/relations/cascading/delete"
require "mongoid/relations/cascading/destroy"
require "mongoid/relations/cascading/nullify"
module Mongoid # :nodoc:
module Relations #:nodoc:
# This module defines the behaviour for setting up cascading deletes and
# nullifies for relations, and how to delegate to the approriate strategy.
module Cascading
extend ActiveSupport::Concern
included do
class_attribute :cascades
self.cascades = []
end
# Perform all cascading deletes, destroys, or nullifies. Will delegate to
# the appropriate strategy to perform the operation.
#
# @example Execute cascades.
# document.cascade!
#
# @since 2.0.0.rc.1
def cascade!
cascades.each do |name|
metadata = relations[name]
strategy = metadata.cascade_strategy
strategy.new(self, metadata).cascade
end
end
# Get the cascading definitions.
#
# @note Refactored from using delegate for class load performance.
#
# @example Get the cascades.
# model.cascades
#
# @return [ Array<String> ] The cascading relation names.
def cascades
self.class.cascades
end
module ClassMethods #:nodoc:
# Attempt to add the cascading information for the document to know how
# to handle associated documents on a removal.
#
# @example Set up cascading information
# Movie.cascade(metadata)
#
# @param [ Metadata ] metadata The metadata for the relation.
#
# @return [ Class ] The class of the document.
#
# @since 2.0.0.rc.1
def cascade(metadata)
tap { self.cascades += [ metadata.name.to_s ] if metadata.dependent? }
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems