shipment_advice: do not copy shipment advice id on moves

In the case of partially receiving goods, the backorder moves created
should not be included in the shipment advice being processed.
But it probably makes sense for outgoing move as well.

shipment_advice/models/stock_move.py

@@ -12,6 +12,7 @@ class StockMove(models.Model):
         ondelete="set null",
         string="Planned shipment",
         index=True,
+        copy=False,
     )
 
     def _plan_in_shipment(self, shipment_advice):

shipment_advice/models/stock_move_line.py

@@ -13,6 +13,7 @@ class StockMoveLine(models.Model):
         ondelete="set null",
         string="Shipment advice",
         index=True,
+        copy=False,
     )
 
     def button_load_in_shipment(self):

shipment_advice/tests/test_shipment_advice.py

@@ -246,3 +246,23 @@ def test_shipment_advice_draft(self):
     def test_shipment_name(self):
         self.assertTrue("OUT" in self.shipment_advice_out.name)
         self.assertTrue("IN" in self.shipment_advice_in.name)
+
+    def test_shipment_advice_receive_partial_move_backorder(self):
+        picking = self.move_product_in1.picking_id
+        # Plan a move
+        self._plan_records_in_shipment(self.shipment_advice_in, self.move_product_in1)
+        self._in_progress_shipment_advice(self.shipment_advice_in)
+        # Partially receive the move and create a backorder
+        for ml in self.move_product_in1.move_line_ids:
+            ml.qty_done = ml.product_uom_qty - 2
+        wizard = (
+            self.env["stock.backorder.confirmation"]
+            .with_context(button_validate_picking_ids=picking.ids)
+            .create({"pick_ids": [(6, 0, picking.ids)]})
+        )
+        wizard.process()
+        # New move created should not be included in the processing shipment
+        backorder_picking = self.env["stock.picking"].search(
+            [("backorder_id", "=", picking.id)]
+        )
+        self.assertFalse(backorder_picking.move_lines.shipment_advice_id)