num_in_stock never changes

[vijay....@jaarwis.com]

Hi
I am working on a store using django oscar, and there is this issue that i am facing. Even after i change status to shipped or complete in dashboard, the num_in_stock never changes.I did dig into the source to find that processing.py in apps/order have a method  consume_stock_allocations which in turn calls consume_allocation(quantity) over each line to update num_in_stock and num_allocated. But the catch is consume_stock_allocations is never called, thus, num_in_stock remains same and num_allocated keeps on increasing.
I dont get it. Was it intentional ? or should i try to call this consume_stock_allocations when order status (from dashboard's OrderDetailView) is changed to shipping  or from OrderListView ) when line status is made to change.Please help me out.
Regards
vijay

[John P]

I think the intention is that you're supposed to manually set num_in_stock and reset num_allocated to zero when you actually do a real count of how many items you have on hand.

[David Winterbottom]

Placing an order will record the stock allocations, but you need to
call the "consume_stock_allocations" method as part of your order
processing. That method needs to be called when you actually ship
something, which happens in different ways in different shops.

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[BugSpencer]

Just for reference, here's how stock allocations are consumed in demo application:
https://github.com/django-oscar/django-oscar/blob/master/sites/demo/apps/order/processing.py#L20

To accomplish this you have to fork checkout app, define your own EventHandler that inherits from Oscar's one,
override handle_shipping_event method and call consume_stock_allocations (which in turn is already in Oscar core).