[Issue] [BUGFIX] Also set the Quantity for the product for correct tier pricing

[m2-assistant]

This issue is automatically created based on existing pull request: #28893: [BUGFIX] Also set the Quantity for the product for correct tier pricing

---

Description (*)

When you retrieve a cart through GraphQl after a quantity update for a product with tier pricing the single unit price is returned.

Manual testing scenarios (*)

1. Add a product with a tier price to the cart
2. Change the Quantity
3. Generate customer token through graphql
4. Retrieve the cart through the cart call
   query {
   cart(cart_id: "SJRzyxm0GV04kZO53OtHD7KwgYhzpVWB"){
   items {
   uid
   quantity
   product{
   name
   sku
   price_tiers {
   quantity
   final_price {
   value
   }
   discount {
   amount_off
   percent_off
   }
   }
   }
   prices{
   price{
   value
   }
   }
   }
   prices {
   discounts {
   label
   amount {
   value
   }
   }
   subtotal_excluding_tax {
   value
   }
   applied_taxes {
   label
   amount {
   value
   }
   }
   }
   }
   }

Expected result:
correct tier price has been applied
Actual result:
price for quantity one is returned.

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[m2-assistant]

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

Verified the issue on Magento 2.4-develop branch and the issue is reproducible. Hence updating the description and confirming the issue.
Tier price for only quantity one is retrieved in the graphql response.

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-6672 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.

[engcom-November]

Development team is currently working on this issue.
Thank you.

[engcom-Hotel]

Hello,

As I can see this issue got fixed in the scope of the internal Jira ticket AC-6672 by the internal team
Related commits: https://github.com/magento/magento2/search?q=AC-6672&type=commits

Based on the Jira ticket, the target version is 2.4.6.

Thanks