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 :slight_smile:

  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? :slight_smile:

Thanks