from orator.migrations import Migration


class CreateVersesTable(Migration):

    def up(self):
        """
        Run the migrations.
        """
        with self.schema.create('verses') as table:
            table.string('book')
            table.small_integer('chapter')
            table.small_integer('nr')
            table.foreign('book').references('canonical_name').on('books')
            table.primary(['book', 'chapter', 'nr'])

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