scinote-web/db/migrate/20170321131116_create_zip_exports.rb

class CreateZipExports < ActiveRecord::Migration[4.2]
  def change
    create_table :zip_exports do |t|
      t.references :user, index: true, foreign_key: true
      t.timestamps null: false
    end

    add_attachment :zip_exports, :zip_file
  end
end