A user is attempting to add or remove product variants from orders using Shopify Flow, but encounters an “invalid ID” error when using the orderEditAddVariant GraphQL mutation via Flow’s “Send Admin API request” action.
The Issue:
Suggested Solution:
Status: The question remains open regarding non-zero priced variants, though a workaround exists for free items.
My question is, is there a way to add/remove variants from an order with Flow based on what is in the order?
Have been trying to use the GraphQL mutation orderEditAddVariant however I am getting an “invalid ID” error whenever I fire the mutation via a “Send Admin API request”. I suspect it’s because the mutation is looking for a CalculatedOrder ID rather than an Order ID.
Any pointers in the right direction are greatly appreciated 
Darren
There is a template showing how to add an item to an order and then discount it 100%. You can’t just edit the order with this mutation and if you read the docs you’ll see id is NOT an order id.
That said, if your item is $0, you can use Flow’s built in “Add order line item” action. And use a condition/code to determine which variant to add.
https://shopify.com/admin/apps/flow/editor/templates/01929bd2-3888-7e92-80b2-a003486aac62
