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Possible solution to Soft Delete in Rubydora 1.7.x
require 'rubydora/repository'
require 'rubydora/rest_api_client'
require 'active_fedora/digital_object'
require 'active_fedora/base'
module Rubydora
class PerformedSoftDelete < RuntimeError
attr_reader :options
def initialize(method_name, pid, options)
@options = options
super("Performed soft delete on '#{pid}' via '#{method_name}'")
end
end
module RestApiClient
# There is likely a better way of doing this, but the ActiveFedora API doesn't
# appear to support soft-deletes (i.e. changing the state to 'D')
#
# So I am intercepting the :purge_object, :purge_datastream, and
# :purge_relationship methods and instead of purging, I'm modifying.
# the state.
module SoftDeleteBehavior
extend ActiveSupport::Concern
included do
before_purge_object do |options|
client[object_url(options[:pid],state: ActiveFedora::DELETED_STATE)].put(nil)
raise PerformedSoftDelete.new('purge_object', options[:pid], options)
end
before_purge_datastream do |options|
client[datastream_url(options[:pid], options[:dsid], dsState: ActiveFedora::DELETED_STATE )].put(nil)
raise PerformedSoftDelete.new('purge_datastream', options[:pid], options)
end
before_purge_relationship do |options|
client[object_relationship_url(options[:pid], state: ActiveFedora::DELETED_STATE)].put(nil)
raise PerformedSoftDelete.new('purge_relationship', options[:pid], options)
end
end
def purge_object(*args)
super(*args) rescue PerformedSoftDelete; true
end
def purge_datastream(*args)
super(*args) rescue PerformedSoftDelete; true
end
def purge_relationship(*args)
super(*args) rescue PerformedSoftDelete; true
end
end
end
class Fc3Service
include Rubydora::RestApiClient unless included_modules.include?(RestClientApi)
include Rubydora::RestApiClient::SoftDeleteBehavior
end
end
module ActiveFedora
DELETED_STATE = 'D'
class ActiveObjectNotFoundError < RuntimeError
attr_reader :base_exception
def initialize(exception, *args)
@base_exception = exception
super("Unable to find via #{args.inspect} in fedora.")
end
end
class Base
module SoftDeleteBehavior
def exists?(*args)
super
rescue ActiveObjectNotFoundError, RestClient::Unauthorized
true
end
end
extend SoftDeleteBehavior
end
class DigitalObject
# Application level enforcement of finding a DELETE_STATE object
module SoftDeleteBehavior
# Because I don't want to be handling RestClient::Unauthorized in a
# controller, I want to change the exception to a more meaningful
# exception
def find(*args)
super
rescue RestClient::Unauthorized => e
raise ActiveObjectNotFoundError.new(e, *args)
end
end
end
end
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