How to update shipping_line for a draft order?

Shopify Partner
23 0 12

I was using DraftOrder REST Api to duplicate a draft order from an order. I'm facing an issue that the shipping_line is null and I have to update it. But it requires a handle parameter for regular shipping which I have no idea about it. I don't want to use a custom shipping. Is there anyone able to do this before? 

Reply 1 (1)

Shopify Partner
1 0 0

Same situation here; also looking for which handle to add to the request.