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Contents
module Tenon
module HasHistory
class ItemReverter
def self.revert(*args)
new(*args).revert
end
def initialize(item, item_version)
@item = item
@item_version = item_version
end
def revert
remove_saved_associations
@item.assign_attributes(params.permit!)
end
private
def params
ActionController::Parameters.new(Marshal.load(@item_version.attrs))
end
# This inserts the existing associations into the form
# but it marks them for destruction. This way they don't "show"
# to the user and if the user saves the form the old associations
# will be deleted and the new ones saved, preventing any duplicates.
def remove_saved_associations
@item.has_history_includes.each do |assoc_name|
assoc = @item.send(assoc_name)
if assoc.respond_to?(:each)
assoc.each(&:mark_for_destruction)
else
assoc.mark_for_destruction
end
end
end
end
end
end
Version data entries
93 entries across 93 versions & 1 rubygems