Don't know how solid this answer will be as i add more models to the activities, but this worked for my likes model.
If anyone can provide another solution that will work with multiple models i would really appreciate it. :)
class ApplicationController < ActionController::Base
def track_activity(trackable, action = params[:action])
current_user.activities.create! action: action, trackable: trackable,
originator: originator
end
def originator
@like.dailypost.user
end
end