def merge(self, name='initial'):
        """Merge migrations into one."""
        migrator = Migrator(self.database)
        migrate = compile_migrations(migrator, self.migrator.orm.values())
        if not migrate:
            return self.logger.error("Can't merge migrations")

        self.clear()

        self.logger.info('Merge migrations into "%s"', name)
        rollback = compile_migrations(self.migrator, [])
        name = self.compile(name, migrate, rollback, 0)

        migrator = Migrator(self.database)
        self.run_one(name, migrator, fake=True, force=True)
        self.logger.info('Migrations has been merged into "%s"', name)
Merge migrations into one.