Schemafile in Xwitter-0.3.0.1 vs Schemafile in Xwitter-0.4.0

@@ -30,9 +30,18 @@
   t.datetime "created_at", null: false
   t.index ["user_id"]
 end
 add_foreign_key "messages", "users"
 
+create_table "user_subscribe_topics", force: :cascade do |t|
+  t.bigint "user_id", null: false
+  t.string "topic",   null: false
+  t.index ["user_id", "topic"], unique: true
+  t.index ["topic"]
+  t.datetime "created_at", null: false
+end
+add_foreign_key "user_subscribe_topics", "users"
+
 create_table "message_topics", force: :cascade, id: false do |t|
   t.string   "topic",      null: false
   t.bigint   "message_id", null: false
   t.index ["topic", "message_id"], unique: true
   t.index ["message_id"]