The Modify Header set the start value from the sale or purchase values but when it is a list or a tuple, it should also ensure it contains records before converting to a list of ids. Closes #13915 (grafted from 35fc6e3d271b4eeb7ef123f58085836fdab77228) --HG-- branch : 6.0
############### Purchase Module ############### The *Purchase Module* provides everything that is required to create and manage purchases made by the company. It adds the idea of a purchase to Tryton, and allows it to be tracked as it moves through various states from draft to done. It makes it easy to create supplier shipments for the purchase, and includes the ability to automatically create related supplier invoices. .. toctree:: :maxdepth: 2 usage/index design