framework/console/controllers/BaseMigrateController.php
protected function migrateUp($class)
    {
        if ($class === self::BASE_MIGRATION) {
            return true;
        }

        $this->stdout("*** applying $class\n", Console::FG_YELLOW);
        $start = microtime(true);
        $migration = $this->createMigration($class);
        if ($migration->up() !== false) {
            $this->addMigrationHistory($class);
            $time = microtime(true) - $start;
            $this->stdout("*** applied $class (time: " . sprintf('%.3f', $time) . "s)\n\n", Console::FG_GREEN);

            return true;
        }

        $time = microtime(true) - $start;
        $this->stdout("*** failed to apply $class (time: " . sprintf('%.3f', $time) . "s)\n\n", Console::FG_RED);

        return false;
    }
protected function migrateUp($class)
    {
        if ($class === self::BASE_MIGRATION) {
            return true;
        }

        $this->stdout("*** applying $class\n", Console::FG_YELLOW);
        $start = microtime(true);
        $migration = $this->createMigration($class);
        if ($migration->up() !== false) {
            $this->addMigrationHistory($class);
            $time = microtime(true) - $start;
            $this->stdout("*** applied $class (time: " . sprintf('%.3f', $time) . "s)\n\n", Console::FG_GREEN);

            return true;
        }

        $time = microtime(true) - $start;
        $this->stdout("*** failed to apply $class (time: " . sprintf('%.3f', $time) . "s)\n\n", Console::FG_RED);

        return false;
    }
Upgrades with the specified migration class.
@param string $class the migration class name
@return bool whether the migration is successful