FEATURE: enforce tagging on categories

app/models/shared_draft.rb

@@ -2,3 +2,19 @@ class SharedDraft < ActiveRecord::Base
   belongs_to :topic
   belongs_to :category
 end
+
+# == Schema Information
+#
+# Table name: shared_drafts
+#
+#  topic_id    :integer          not null
+#  category_id :integer          not null
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#  id          :integer          not null, primary key
+#
+# Indexes
+#
+#  index_shared_drafts_on_category_id  (category_id)
+#  index_shared_drafts_on_topic_id     (topic_id) UNIQUE
+#