class CreatePropositions < ActiveRecord::Migration[4.2] def change create_table :propositions do |t| t.references :proposer, index: true t.references :proposition_accepting, polymorphic: true t.index [:proposition_accepting_id, :proposition_accepting_type], name: "proposition_accepting_index" t.references :proposable, polymorphic: true, index: true t.integer :status t.timestamps end end end