[FIX] stock: populate date_done field on picking

addons/stock/models/stock_picking.py

@@ -553,6 +553,7 @@ class Picking(models.Model):
                     todo_moves |= new_move
                     #'qty_done': ops.qty_done})
         todo_moves.action_done()
+        self.write({'date_done': fields.Datetime.now()})
         return True
 
     do_transfer = action_done #TODO:replace later

addons/stock/tests/test_move2.py

@@ -257,6 +257,7 @@ class TestSinglePicking(TestStockCommon):
         # valid with backorder creation
         delivery_order.move_lines[0].move_line_ids[0].qty_done = 1
         delivery_order.do_transfer()
+        self.assertNotEqual(delivery_order.date_done, False)
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.productA, pack_location), 0.0)
 
         backorder = self.env['stock.picking'].search([('backorder_id', '=', delivery_order.id)])
@@ -294,6 +295,7 @@ class TestSinglePicking(TestStockCommon):
         # valid with backorder creation
         delivery_order.move_lines[0].move_line_ids[0].qty_done = 1
         delivery_order.do_transfer()
+        self.assertNotEqual(delivery_order.date_done, False)
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.productA, pack_location), 0.0)
 
         backorder = self.env['stock.picking'].search([('backorder_id', '=', delivery_order.id)])