Hi Marius,
I am afraid that what you are looking for is not possible.
Up to shopping cart item gets saved, there is no status to be read.
If your scenario involves approval, maybe you can try to read the approvers determined for the current document and then assign a status by your own (like awaiting approval or in revision, in case workitem is assigned to the requester).
I can't see a way to read a "buffer" status.
Regards,
Ricardo
Add comment