añadir track_activity para mostrar futuras notificaciones a los usuarios

app/controllers/application_controller.rb

@@ -108,4 +108,12 @@ class ApplicationController < ActionController::Base
         store_location_for(:user, request.path)
       end
     end
+
+    def track_activity(trackable)
+      if trackable.is_a? Comment
+        action = trackable.root? ? "debate_comment" : "comment_reply"
+        activity = current_user.activities.create! action: action, trackable: trackable
+        add_notifications_for activity
+      end
+    end
 end

app/controllers/comments_controller.rb

@@ -9,6 +9,7 @@ class CommentsController < ApplicationController
   def create
     if @comment.save
       CommentNotifier.new(comment: @comment).process
+      track_activity @comment
     else
       render :new
     end

app/models/activity.rb

@@ -1,5 +1,4 @@
 class Activity < ActiveRecord::Base
-
   belongs_to :actionable,  -> { with_hidden }, polymorphic: true
   belongs_to :user, -> { with_hidden }
 
@@ -24,5 +23,4 @@ class Activity < ActiveRecord::Base
   def self.by(user)
     where(user: user)
   end
-
 end

db/migrate/20150928075646_create_activities.rb

@@ -0,0 +1,9 @@
+class CreateActivities < ActiveRecord::Migration
+  def change
+    create_table :activities do |t|
+      t.belongs_to :user, index: true, foreign_key: true
+      t.string :action
+      t.belongs_to :trackable, polymorphic: true
+    end
+  end
+end

db/schema.rb

@@ -396,6 +396,7 @@ ActiveRecord::Schema.define(version: 20151215165824) do
   add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope", using: :btree
   add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope", using: :btree
 
+  add_foreign_key "activities", "users"
   add_foreign_key "administrators", "users"
   add_foreign_key "annotations", "legislations"
   add_foreign_key "annotations", "users"