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# File 'lib/property_sets/delegator.rb', line 20
def delegate_to_property_set(setname, mappings)
raise "Second argument must be a Hash" unless mappings.is_a?(Hash)
mappings.each do |old_attr, new_attr|
define_method(old_attr) { send(setname).send(new_attr) }
alias_method "#{old_attr}_before_type_cast", old_attr
define_method("#{old_attr}?") { send(setname).send("#{new_attr}?") }
define_method("#{old_attr}=") { |value| send(setname).send("#{new_attr}=", value) }
define_method("#{old_attr}_changed?") do
collection_proxy = send(setname)
return false unless collection_proxy.loaded?
setting = collection_proxy.lookup_without_default(new_attr)
if !setting
false elsif setting.new_record?
collection_proxy.association_class.default(new_attr) != setting.value
else
setting.value_changed?
end
end
end
end
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