class CreateDocuments < ActiveRecord::Migration def change create_table :documents do |t| t.integer :typ, :default=>0 t.string :name t.text :text t.string :etherpadkey, :default=>"" t.references :parent,:polymorphic=>{:default=>'Thema'} t.timestamps end add_index :documents, :parent_id add_index :documents, :parent_type end end