def generate_requests(self):
move_obj = Pool().get('stock.move')
# For stock moves which are not yet received from the supplier, the
# planned date has to be updated to the current date. If it is not
# the future stock will not include those moves.
#
# If this step is not done, tryton assumes that all moves from supplier
# which have a planned date before today and not received will never
# be received, prompting the purchase request algorithm to create new
# purchase requests for such orders.
move_obj.update_supply_planned_date()
return super(PurchaseRequest, self).generate_requests()
