Invalid SKU Handling for Linked Products in Magento

[Syamsg]

Preconditions and environment

• Magento version 2.4.x

Steps to reproduce

1. Create a New Product:

   • Navigate to Catalog > Products.
   • Click on Add Product.
   • Fill in the necessary details, and in the SKU field, enter 0.
   • Save the product.

2. Edit an Existing Product:

   • Go back to Catalog > Products.
   • Choose any existing product you wish to link the previously created product to.
   • Scroll down to the Linked Products section (Related Products, Up-Sells, or Cross-Sells).

3. Add the Product with SKU "0":

   • In the linked products section, search for the product you created with the SKU of 0.
   • Add this product as a linked product.

4. Save the Main Product:

   • Click on Save to save the changes made to the main product.

5. Observe the Error:

   • After attempting to save, an error message will appear: "The linked product SKU is invalid. Verify the data and try again."
     

Expected result

The system should allow the linking of the product with a SKU of "0" without throwing an error, or it should prevent saving a product with "0" as a SKU outright.

Actual result

The system throws an error stating that the linked product SKU is invalid, preventing any changes to the product.

Additional information

This issue arises in the file Magento\Catalog\Model\ProductLink\Repository, specifically in the public function save, where the following condition is used:

if (!$entity->getLinkedProductSku()) {
    throw new NoSuchEntityException(__('The linked product SKU is invalid. Verify the data and try again.'));
}

One approach to resolve this is by adding an explicit check for the SKU value to prevent saving it as "0." For instance, you could add a validation condition to prevent saving a SKU as "0" at the time of saving the product.

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 @Syamsg. Thank you for your report.
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[m2-assistant]

Hi @engcom-Bravo. Thank you for working on this issue.
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[engcom-Bravo]

Hi @Syamsg,

Thanks for your reporting and collaboration.

We have verified the issue in Latest 2.4-develop instance and the issue is reproducible.Kindly refer the screenshots.

The system throws an error stating that the linked product SKU is invalid, preventing any changes to the product.

Hence Confirming the issue.

Thanks.