class AddPermalinkToPosts < ActiveRecord::Migration
  def self.up
    remove_column :posts, :slug
    remove_column :post_versions, :slug
    add_column :posts, :permalink, :string
    add_column :post_versions, :permalink, :string
  end

  def self.down
    remove_column :posts, :permalink
    remove_column :post_versions, :permalink
    add_column :posts, :slug, :string
    add_column :post_versions, :slug, :string
  end
end