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# File 'lib/cfoundry/v2/model_magic/to_one.rb', line 3
def to_one(name, opts = {})
to_one_relations[name] = opts
association_name = opts[:as] || name
default = opts[:default]
if has_default = opts.key?(:default)
defaults[:"#{name}_guid"] = default
end
define_method(name) do
return @cache[name] if @cache.key?(name)
return @client.send(association_name) unless persisted?
@cache[name] =
if @manifest && @manifest[:entity].key?(name)
@client.send(:"make_#{association_name}", @manifest[:entity][name])
elsif url = send("#{name}_url")
@client.send(:"#{association_name}_from", url)
else
default
end
end
define_method("create_#{name}") do |*args|
associated_instance = @client.send(:"#{association_name}")
args.first.each do |name, value|
associated_instance.send("#{name}=", value)
end if args.first.is_a? Hash
associated_instance.create!
self.send("#{name}=", associated_instance)
end
define_method(:"#{name}_url") do
manifest[:entity][:"#{name}_url"]
end
define_method(:"#{name}=") do |assigned_value|
klass = self.class.objects[association_name]
unless has_default && assigned_value == default
CFoundry::Validator.validate_type(assigned_value, klass)
end
@manifest ||= {}
@manifest[:entity] ||= {}
old_guid = @manifest[:entity][:"#{name}_guid"]
association_guid = assigned_value ? assigned_value.guid : nil
if old_guid != (association_guid)
old_obj =
@cache[name] || klass.new(@client, old_guid, @manifest[:entity][name])
@changes[name] = [old_obj, assigned_value]
end
@cache[name] = assigned_value
@manifest[:entity][:"#{name}_guid"] = association_guid
@diff[:"#{name}_guid"] = association_guid
assigned_value
end
end
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