Hi there ! I''m doing a rails engine and I have written several ruby modules in it that will be included in the models of the future client Rails applications. I''m facing a weird issue now : The modules inside my engine use massively mongoid. (To append fields to models, declare indexes and stuff) But when I use the DateTime type for some fields, it will throw a *NoMethod error* on save like : undefined method `__bson_dump__'' for XXXX I checked the sources of Mongoid and identified where all the extension logic (for DateTime especially) was implemented. Is it that I did not properly require dependencies or something ? Because I have correctly added mongoid gem to my engine dependencies gemspec and I even require ''mongoid'' in my engine.rb file, so that all the initialization of mongoid could be entirely done before my engine initializes itself. *Thank you for your attention* One of my module looks like : module Event included do include Mongoid::Document field :starts_at, :type => DateTime end end class MyEvent include Engine::Event end MyEvent.new :starts_at => DateTime.now -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/WEyaiIcTLIAJ. For more options, visit https://groups.google.com/groups/opt_out.