[Idea] Classify mails on basis other than users

[NipunBinjola]

You have created a polymorphic association of user , to track email for any model . However what if i need to store context of the mail also, alongwith the user and identify what mails belong to what scenarios.
Lets say i have two different models, User and Model1 , having objects user and m1 .
Now i need all messages for object m1 using m1.messages , but those entries should also be having user_id, so that i can also fetch user.messages. Tracking user is a fundamental requirement, how should we classify mails based on other models, while keeping reference to user_id and user_type ?
Thought : How about one more polymorphic association - context. track context: m1 will save context_id as m1.id and context_type as Model1.
Currently added polymorphic reference using migration, and added has_many reference to my Model1 file,

class AddContextToAhoyMessages < ActiveRecord::Migration[5.0]
  def change
    add_reference :ahoy_messages, :context, polymorphic: true
  end
end

still i need to use track extra: which required saving context_id and context_type individually, and mail_object.context does not completes the association.
Hope this makes some sense, would be glad to get more insights on this