This is related to https://github.com/mongoid/mongoid/issues/1653

class Referenced
include Mongoid::Document
belongs_to :inner
end

class Inner
include Mongoid::Document
has_one :referenced
validates_presence_of :referenced
embedded_in :outer
end

class Outer
include Mongoid::Document
embeds_one :inner
end

Now, when I try and save an Outer with an Inner, the Inner does not save - because the Referenced could never have a valid id. I understand the rationale behind this, but would it be possible to detect this pattern and throw an error somewhere? Maybe checking for :embedded_in and :has relation on the same document?

Thanks!