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ruby-on-railsmongodbinitializationmongoidembedded-database

Mongoid: embedded documents automatically initializing on construction of parent

Is there a way to get embedded documents to initialize automatically on construction in mongoid? What I mean is given that User which embeds a garage document. I have to write the following code to fully set up the user with the garage:

user = User.create!(name: "John")
user.build_garage
user.garage.cars << Car.create!(name: "Bessy")

Is there a way I can skip calling user.build_garage?

Thanks

Solution

  • You can add a callback to the User model like this:

    class User
  ...
  after_initialize do |u|
    u.build_garage unless u.garage
  end
  ...
end

    This callback fires after each instantiation of the class, so it fires after 'find' and 'new'.