Internal Server Error in /V1/creditmemo API Endpoint

[mlf20]

Preconditions and environment

• Magento version 2.4

Steps to reproduce

1. Retrieve auth token from the admin endpoint /V1/integration/admin/
2. Request endpoint:

curl -H 'Content-Type: application/json' -H 'Authorization: Bearer' <AUTH TOKEN> -d '{"entity": ""}' -X POST http://<MAGENTO_URL>/pub/rest/default/V1/creditmemo

Expected result

Returns a 400 error as the request is malformed.

Actual result

Returns a 500 status code.

Additional information

output of var/log/system.log:

[2022-08-01T11:34:36.255953+00:00] main.CRITICAL: Error: Call to a member function getId() on null in /magento/vendor/magento/module-sales/Model/ResourceModel/Order/Creditmemo.php:50
	Stack trace:
	#0 /magento/vendor/magento/framework/Model/ResourceModel/Db/AbstractDb.php(393): Magento\Sales\Model\ResourceModel\Order\Creditmemo->_beforeSave()
	#1 /magento/vendor/magento/module-sales/Model/Order/CreditmemoRepository.php(141): Magento\Framework\Model\ResourceModel\Db\AbstractDb->save()
	#2 /magento/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Sales\Model\Order\CreditmemoRepository->save()
	#3 /magento/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Sales\Model\Order\CreditmemoRepository\Interceptor->___callParent()
	#4 /magento/vendor/magento/module-inventory-sales/Plugin/Sales/OrderManagement/DeductSourceItemQuantityOnRefundPlugin.php(96): Magento\Sales\Model\Order\CreditmemoRepository\Interceptor->Magento\Framework\Interception\{closure}()
	#5 /magento/vendor/magento/framework/Interception/Interceptor.php(135): Magento\InventorySales\Plugin\Sales\OrderManagement\DeductSourceItemQuantityOnRefundPlugin->aroundSave()
	#6 /magento/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Sales\Model\Order\CreditmemoRepository\Interceptor->Magento\Framework\Interception\{closure}()
	#7 /magento/generated/code/Magento/Sales/Model/Order/CreditmemoRepository/Interceptor.php(59): Magento\Sales\Model\Order\CreditmemoRepository\Interceptor->___callPlugins()
	#8 [internal function]: Magento\Sales\Model\Order\CreditmemoRepository\Interceptor->save()
	#9 /magento/vendor/magento/module-webapi/Controller/Rest/SynchronousRequestProcessor.php(95): call_user_func_array()
	#10 /magento/vendor/magento/module-webapi/Controller/Rest.php(188): Magento\Webapi\Controller\Rest\SynchronousRequestProcessor->process()
	#11 /magento/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Webapi\Controller\Rest->dispatch()
	#12 /magento/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Webapi\Controller\Rest\Interceptor->___callParent()
	#13 /magento/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Webapi\Controller\Rest\Interceptor->Magento\Framework\Interception\{closure}()
	#14 /magento/generated/code/Magento/Webapi/Controller/Rest/Interceptor.php(23): Magento\Webapi\Controller\Rest\Interceptor->___callPlugins()
	#15 /magento/vendor/magento/framework/App/Http.php(116): Magento\Webapi\Controller\Rest\Interceptor->dispatch()
	#16 /magento/generated/code/Magento/Framework/App/Http/Interceptor.php(23): Magento\Framework\App\Http->launch()
	#17 /magento/vendor/magento/framework/App/Bootstrap.php(264): Magento\Framework\App\Http\Interceptor->launch()
	#18 /magento/pub/index.php(30): Magento\Framework\App\Bootstrap->run()
	#19 {main} [] []

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @mlf20. Thank you for your report.
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• Steps to reproduce
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[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

  If the issue has a valid description, the label Issue: Format is valid will be added to the issue automatically. Please, edit issue description if needed, until label Issue: Format is valid appears.

• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue. If the report is valid, add Issue: Clear Description label to the issue by yourself.

• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.4-develop branch

  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
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• 5. Add label Issue: Confirmed once verification is complete.

• 6. Make sure that automatic system confirms that report has been added to the backlog.

[engcom-November]

Verified the issue on Magento 2.4-develop branch and the issue is reproducible. Hence confirming this issue.

Exception stack trace

[2022-08-16T11:33:36.482233+00:00] main.CRITICAL: Error: Call to a member function getId() on null in /var/www/html/mg24ce/magento2ce/app/code/Magento/Sales/Model/ResourceModel/Order/Creditmemo.php:50
Stack trace:
#0 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/Model/ResourceModel/Db/AbstractDb.php(393): Magento\Sales\Model\ResourceModel\Order\Creditmemo->_beforeSave()
#1 /var/www/html/mg24ce/magento2ce/app/code/Magento/Sales/Model/Order/CreditmemoRepository.php(141): Magento\Framework\Model\ResourceModel\Db\AbstractDb->save()
#2 [internal function]: Magento\Sales\Model\Order\CreditmemoRepository->save()
#3 /var/www/html/mg24ce/magento2ce/app/code/Magento/Webapi/Controller/Rest/SynchronousRequestProcessor.php(95): call_user_func_array()
#4 /var/www/html/mg24ce/magento2ce/app/code/Magento/Webapi/Controller/Rest.php(195): Magento\Webapi\Controller\Rest\SynchronousRequestProcessor->process()
#5 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/Interception/Interceptor.php(58): Magento\Webapi\Controller\Rest->dispatch()
#6 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/Interception/Interceptor.php(138): Magento\Webapi\Controller\Rest\Interceptor->___callParent()
#7 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/Interception/Interceptor.php(153): Magento\Webapi\Controller\Rest\Interceptor->Magento\Framework\Interception\{closure}()
#8 /var/www/html/mg24ce/magento2ce/generated/code/Magento/Webapi/Controller/Rest/Interceptor.php(23): Magento\Webapi\Controller\Rest\Interceptor->___callPlugins()
#9 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/App/Http.php(116): Magento\Webapi\Controller\Rest\Interceptor->dispatch()
#10 /var/www/html/mg24ce/magento2ce/lib/internal/Magento/Framework/App/Bootstrap.php(264): Magento\Framework\App\Http->launch()
#11 /var/www/html/mg24ce/magento2ce/pub/index.php(30): Magento\Framework\App\Bootstrap->run()
#12 {main} [] []