Nette\Database\Context::rollBack PHP Method

    public function rollBack()
    {
        $this->connection->rollBack();
    }

 /**
  * @param \NetteAddons\Model\Importers\IAddonVersionsImporter
  * @param string
  * @param int
  */
 private function processUpdate(IAddonVersionsImporter $addonVersionImporter, $url, $id)
 {
     try {
         $this->db->beginTransaction();
         $addon = $addonVersionImporter->getAddon($url);
         /** @var \Nette\Database\Table\ActiveRow $row */
         $row = $this->db->table('addons')->get($id);
         if (!$row) {
             $this->db->rollBack();
             return;
         }
         $row->update(array('composerVendor' => $addon->getComposerVendor(), 'composerName' => $addon->getComposerName(), 'shortDescription' => Strings::truncate($addon->getPerex(), 250), 'stars' => $addon->getStars()));
         $this->db->table('addons_versions')->where('addonId = ?', $id)->delete();
         $row = $this->db->table('addons_resources')->where('addonId = ? AND type = ?', $id, AddonResources::RESOURCE_PACKAGIST)->fetch();
         if ($row) {
             if ($addon->getPackagist() === null) {
                 $row->delete();
             } else {
                 $row->update(array('resource' => $addon->getPackagist()));
             }
         } elseif ($addon->getPackagist() !== null) {
             $this->db->table('addons_resources')->insert(array('addonId' => $id, 'type' => AddonResources::RESOURCE_PACKAGIST, 'resource' => $addon->getPackagist()));
         }
         $row = $this->db->table('addons_resources')->where('addonId = ? AND type = ?', $id, AddonResources::RESOURCE_GITHUB)->fetch();
         if ($row) {
             if ($addon->getGithub() === null) {
                 $row->delete();
             } else {
                 $row->update(array('resource' => $addon->getGithub()));
             }
         } elseif ($addon->getGithub() !== null) {
             $this->db->table('addons_resources')->insert(array('addonId' => $id, 'type' => AddonResources::RESOURCE_GITHUB, 'resource' => $addon->getGithub()));
         }
         foreach ($addon->getVersions() as $version) {
             /** @var \Nette\Database\Table\ActiveRow $row */
             $row = $this->db->table('addons_versions')->insert(array('addonId' => $id, 'version' => $version->getVersion(), 'license' => implode(', ', $version->getLicenses()), 'distType' => 'zip', 'distUrl' => 'https://nette.org', 'updatedAt' => new DateTime(), 'composerJson' => ''));
             if (!$row) {
                 $this->db->rollBack();
                 return;
             }
             foreach ($version->getDependencies() as $dependency) {
                 // @todo addon link
                 $this->db->table('addons_dependencies')->insert(array('versionId' => $row->id, 'packageName' => $dependency->getDependencyName(), 'version' => $dependency->getDependencyVersion(), 'type' => $dependency->getType()));
             }
         }
         $this->db->commit();
     } catch (\Exception $e) {
         Debugger::log($e);
         $this->db->rollBack();
     }
 }