fixes #2191

db/migrate/20140725003232_create_forum_subscriptions.rb

@@ -0,0 +1,13 @@
+class CreateForumSubscriptions < ActiveRecord::Migration
+  def change
+    create_table :forum_subscriptions do |t|
+      t.integer :user_id
+      t.integer :forum_topic_id
+      t.datetime :last_read_at
+      t.string :delete_key
+    end
+
+    add_index :forum_subscriptions, :user_id
+    add_index :forum_subscriptions, :forum_topic_id
+  end
+end