from orator.migrations import Migration


class CreateAlternativeBookNamesTable(Migration):

    def up(self):
        """
        Run the migrations.
        """
        with self.schema.create('alternative_book_names') as table:
            table.string('name').primary()
            table.string('book')
            table.foreign('book').references('canonical_name').on('books')

    def down(self):
        """
        Revert the migrations.
        """
        self.schema.drop('alternative_book_names')