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Contents
# encoding: utf-8
module Mongoid
module Relations
module Cascading
class Nullify
attr_accessor :document, :relation, :metadata
# Initialize the new cascade strategy, which will set up the relation
# and the metadata.
#
# @example Instantiate the strategy
# Strategy.new(document, metadata)
#
# @param [ Document ] document The document to cascade from.
# @param [ Metadata ] metadata The relation's metadata.
#
# @return [ Strategy ] The new strategy.
def initialize(document, metadata)
@document, @metadata = document, metadata
@relation = document.send(metadata.name)
end
# This cascade does not delete the referenced relations, but instead
# sets the foreign key values to nil.
#
# @example Nullify the reference.
# strategy.cascade
def cascade
relation.nullify if relation
end
end
end
end
end
Version data entries
91 entries across 86 versions & 7 rubygems