class CreateSourceTokens < ActiveRecord::Migration
  def change
    create_table :source_tokens, id: false do |t|
      t.column :token, 'uuid', primary_key: true, null:false
      t.datetime :expiration
      t.references :tokenizable, :polymorphic => true
      t.references :event
      t.integer :max_uses, default: 1
      t.integer :total_uses, default: 0
      t.timestamps
    end

    add_index :source_tokens, :token, :unique => true
    add_index :source_tokens, :expiration
    add_index :source_tokens, [:tokenizable_id, :tokenizable_type]

  end
end