Rails - Mar 2008 - How to DRY up this model a bit?

Hi again,

I have this model, trip.rb, which is getting bloated with the same
things repeated all over. I''m new to both rails and ruby so
I''m
looking for help on how to DRY this thing a bit

I basically have to repeat this a lot of time (replacing "departure"
and "departures" with other models) and I would love to find a way to
write it once :)


	def new_departure_attributes=(departure_attributes)
		departure_attributes.each do |attributes|
			departures.build(attributes)
		end
	end

	def existing_departure_attributes=(departure_attributes)
		departures.reject(&:new_record?).each do |departure|
			attributes = departure_attributes[departure.id.to_s]
			if attributes
				departure.attributes = attributes
			else
				departures.delete(departure)
			end
		end
	end

	def save_departures
		departures.each do |departure|
			departure.save(false)
		end
	end


Can anyone educate me a bit? :)

Thanks
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