Question posted in 
I am using Shopify Admin REST API for item and inventory sync and I am not sending inventory_quantity field in variants API, but I received following email from Shopify few days ago. I am also sending correct location_id when creating fulfillment and it is created successfully in Shopify.
The location_id field is now required when creating fulfillment and
refund requests.Inventory_quantity and inventory_quantity_adjustment
can no longer be set on the product variant.
Deprecated in 2019-10 and support will be removed on July 1, 2020
I wanted to know if the email above is a generic email sent by Shopify to all developers? or am I doing something wrong here?
2
Answers
You will want to check the new Inventory Level and Inventory Item endpoints in the Rest API. With a variant’s inventory_item_id and a location ID, you can update inventory.
Clearly you can no longer just set a variant’s inventory level. That went the way of the DODO this year.
Ignore it if you’re sure that you don’t use these deprecated attributes anymore. I think they recently introduced this notification system which sends warnings to developers if they detected any deprecated calls in the past. They just alert you, they don’t scan your app code so they don’t know whether you fixed the issue or not. I was getting similar warnings despite that I was sure that the issue had been fixed earlier.
Anyway, to get peace of mind, go to the Apps area in your Shopify Partners account. The table that lists all your apps has now the API health column showing the status of your apps in terms of deprecated calls. You will see a warning (orange dot) if they detected any deprecated calls in the past 30 days. The warning is provided with some additional information like the last time the issue was detected and the deadline to fix it to, example. You can get more details about the deprecation by clicking on to the warning.
If it’s a private app, just check your code again for using the deprecated attributes mentioned in the email.