saving embedded documents mongoid

Question

I have a person model which embeds_many addresses.

Is there a way to always clear embedded relationship when updating? For example, If I send a complete representation of a person, including addresses, I want to replace existing addresses rather than appending them.

My temp fix is a before_save callback which clear out all addresses

class Person
  include Mongoid::Document
  embeds_many :addresses

  before_save :clear_addresses!

  def clear_addresses!
    self.unset(:addresses)
  end
end

If you do that, why having a embeds_many addresses ? because you never have this addresses associate to your person .... — shingara, Apr 06 '12 at 07:33

score 1 · Answer 1 · answered Apr 06 '12 at 07:33

1

You can pass an empty addresses params when you update your person

person.update_attributes(:addresses => [])

answered Apr 06 '12 at 07:33

shingara

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Yes, I sure can. But what I want to do is to _clear every time_. If addresses is passed these should override already persisted addresses. – Tim Brunsmo Apr 07 '12 at 13:35
I really don't understand the purpose :( – shingara Apr 08 '12 at 19:35
With my current setup addresses should be cleared unless it is sent to the server. So, not passing any addresses should clear out existing ones. – Tim Brunsmo Apr 09 '12 at 14:12

saving embedded documents mongoid

1 Answers1