class CreateAdminComments < ActiveRecord::Migration def change create_table :active_admin_comments do |t| t.string :resource_id, :null => false t.string :resource_type, :null => false t.references :author, :polymorphic => true t.string :namespace t.text :body t.timestamps end add_index :active_admin_comments, [:namespace] add_index :active_admin_comments, [:author_type, :author_id] end end