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# encoding: utf-8 require "mongoid/relations/cascading/delete" require "mongoid/relations/cascading/destroy" require "mongoid/relations/cascading/nullify" require "mongoid/relations/cascading/restrict" module Mongoid module Relations # 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| if !metadata || !metadata.versioned? if meta = relations[name] strategy = meta.cascade_strategy strategy.new(self, meta).cascade end end end end module ClassMethods # 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) cascades.push(metadata.name.to_s) if metadata.dependent? self end end end end end
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13 entries across 13 versions & 1 rubygems