Magento 2.4.3 Bundle Product not working with "Use Flat Catalog Product"=Yes

[davidandersson1]

Preconditions (*)
Magento Versions: 2.4.2

Steps to reproduce (*)

1. Admin - Stores - Configuration - Catalog - Catalog - Set "Use Flat Catalog Product" to Yes and Save
2. Reindex and Clear cache
3. Front-end - Open any Bundle Product - Issue: Below error message is displayed on UI

Expected result (*)
No Exception on UI

Actual result (*)
[2021-08-27 12:17:35] main.CRITICAL: Error: Call to undefined method Magento\Catalog\Model\ResourceModel\Product\Flat::getLinkField() in /var/www/html/magento2/magento243/vendor/magento/module-eav/Model/Entity/Collection/AbstractCollection.php:1066

SKU: 24-WG080, this is the sku of sample data and throw above error on product page with flat product enabled.

Attached here some screenshots of error & how looks bundle product page.

Please note: except default magento modules, there is no any single 3rd party modules has been installed.

It would be great if you could provide solution for this issue. looking forward to your reply!

Thanks,
David Andersson

[m2-assistant]

Hi @davidandersson1. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

Please, add a comment to assign the issue: @magento I am working on this

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

⚠️ According to the Magento Contribution requirements, all issues must go through the Community Contributions Triage process. Community Contributions Triage is a public meeting.

🕙 You can find the schedule on the Magento Community Calendar page.

📞 The triage of issues happens in the queue order. If you want to speed up the delivery of your contribution, please join the Community Contributions Triage session to discuss the appropriate ticket.

🎥 You can find the recording of the previous Community Contributions Triage on the Magento Youtube Channel

✏️ Feel free to post questions/proposals/feedback related to the Community Contributions Triage process to the corresponding Slack Channel

[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.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 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:
Steps to reproduce:
Admin - Stores - Configuration - Catalog - Catalog - Set "Use Flat Catalog Product" to Yes and Save
Reindex and Clear cache
Front-end - Open any Bundle Product - Issue: Below error message is displayed on UI

Front-end - There is no issue with Simple Products - User is able to view Simple Product Details page
Front-end - Home - Open Default Category view having sub root category (Ex: default) - Issue: Exception

/var/log/system.log:

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.magento.com/browse/AC-1082 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-November. Thank you for verifying the issue.
Issue Available: @engcom-November, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.