db/migrate/20140202020202_create_bookmarks.rb in blacklight-6.1.0 vs db/migrate/20140202020202_create_bookmarks.rb in blacklight-6.2.0

@@ -1,11 +1,12 @@
 # frozen_string_literal: true
 class CreateBookmarks < ActiveRecord::Migration
   def self.up
     create_table :bookmarks do |t|
-      t.integer :user_id, :null=>false
+      t.integer :user_id, index: true, null: false
       t.string :user_type
-      t.string :document_id
+      t.string :document_id, index: true
+      t.string :document_type
       t.string :title
       t.timestamps null: false
     end
   end