Configurable product addtocart with restAPI not working as expected

Addtocart using same API work fine for simple product, but while adding configurable product with restAPI, it creates duplicate product entry in cart, it should ideally update the qty.
Using single store and quote id is also same.

Preconditions

1. Magento 2.2.3 (with sample data)

Steps to reproduce

1. Addtocart a configurable product from frontend.

2. Create quote id with customer token, (http://local.magento.com/rest/default/V1/carts/mine)

3. Addtocart same configurable product with rest API (http://local.magento.com/rest/default/V1/carts/mine/items)

Requets: { "cartItem": { "sku": "MJ12", "qty": 1, "quote_id": "11", "product_option": { "extension_attributes": { "configurable_item_options": [ { "option_id": "142", "option_value": "167" }, { "option_id": "93", "option_value": "49" } ] } } } }

Expected result

In cart there should be single product with two qty.

Actual result

@pankajkavani

[AlanJudi]

Dude, both links that you provided don't work!

Hey Ala, That won’t work thats local setup, you can try this on any magento2 environment.

On Mon, 7 May 2018 at 12:20 PM, Ala Khalil ***@***.***> wrote: Dude, both links that you provided don't work! — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#15028 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AKlLkADCJQbbVCVi-AaPju4qRwR4Efj0ks5tv-7TgaJpZM4T0b1s> .

-- Thanks & Regards, Yash Patadia

[engcom-backlog-nickolas]

Hello @yspeedwicked, thank you for your report. Unfortunately I'm not able to reproduce this issue.

Could you please add more details?

@zamboten thanks this worked for me.

@engcom-backlog-nickolas can you please refer to its duplicate pull, #15720

Closing this issue.

[magento-engcom-team]

Hi @yspeedwicked. Thank you for your report.
The issue has been fixed in #15720 by @zamboten in 2.2-develop branch
Related commit(s):

• 03298b3b2f322ca0bebc423f906428718b31809a

The fix will be available with the upcoming 2.2.7 release.