Question

I have Mongoid classes as follows:

class Order
  include Mongoid::Document
  embeds_many :animals
end

class Animal
  include Mongoid::Document
  embedded_in :order

  def self.has_gender
    field :gender, type: String
  end
end

class Deer < Animal
  has_gender
end

and when I call animals on any order, even empty one:

Order.new.animals

I get the following error:

undefined method `has_gender' for Deer:Class

Any ideas?

Answer 1

The problem is somewhere else. Your code works on my machine. (I’m using Mongoid 3.0-rc, though).

order = Order.new
order.animals << Animal.new
order.animals << Deer.new
order.save

puts Order.first.animals
# >> #<Animal:0x007fca04bae890>
# >> #<Deer:0x007fca04bb4b50>