Hi,
I’ve built a custom CarrierService to return shipping rates. I’ve got this working on the whole, but running into behaviour that I can’t find documented, and an issue with subscription shipping rates.
First off, it seems that if there is a Subscription product in the cart then Shopify makes two requests to the CarrierService – one containing one-off products AND subscription products, and one containing subscription products only. At first this didn’t make sense to me, but now I think I understand that the initial shipping cost for the subscription products is ‘bundled’ into the one-off products, and the second request is used for showing shipping cost for the renewal of the subscription. If a cart ONLY contains subscription products, my CarrierService still seems to receive two identical requests from Shopify. I can’t find any documentation mentioning any of this behaviour though, can anyone point me in the right direction?
Secondly, and most confusingly: my CarrierRate is correctly returning two rates for each of these requests – a tracked and an untracked option for each. However, for the Subscription shipping part, the Shopify cart displays the first of these returned rates.
i.e., my CarrierService is returning:-
{"rates":[{"service_name":"Untracked subscription (4 untracked shipments of 1 copies) (3-5 working days)","service_code":"UNTRACKED","total_price":500,"description":"Untracked subscription (4 untracked shipments of 1 copies) (3-5 working days)","currency":"GBP"},{"service_name":"Tracked shipping (Tracked Yodel) (with 4 tracked magazine shipments)","service_code":"TRACKED","total_price":1886,"description":"Tracked shipping","currency":"GBP"}]}
But this is what is displayed on the cart page:
- so only the first shipping rate is being displayed, with no option for customer to choose the second (in this case, tracked shipping for subscription renewals).
Again, I can’t find any documentation describing this behaviour. Is there a way to provide multiple options for subscription shipping? Am I doing something wrong?
Thanks,
