spree/spree_wombat — pull request #13 by JDutil (2014-07-10 00:03:37+00:00)
Title: Use id as backup to sku.

If sku is not present the product will not pass wombats push validation. It might be better to just switch to id instead but that isn't backwards compatible for people. Opening to debate if this should be changed or not as we could just let products fail to push if they don't have a sku assigned yet.