chunk(200, function ($keys) { foreach ($keys as $key) { $key->update(['credentialId' => $key->credentialId]); } }); } /** * Reverse the migrations. * * @return void */ public function down() { WebauthnKey::select(['id', 'credentialId'])->chunk(200, function ($keys) { foreach ($keys as $key) { $key->setRawAttributes(['credentialId' => base64_encode($key->credentialId)]); $key->save(); } }); } };