class CreateJoinTableLibraryItemContributors < ActiveRecord::Migration[6.0]
  def change
    create_join_table :library_bibs, :library_contributors do |t|
      t.index [:library_bib_id, :library_contributor_id],
        unique: true, name: :unique_index_bib_contributor

      t.integer :type, null: false
    end
  end
end