[IMP] mrp: new prepare move line finished vals to write custom values before the post_inventory

closes odoo/odoo#146526

X-original-commit: 6f5519105787ead32d27658ac291ef18dac51698
Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/mrp/models/mrp_production.py

@@ -1657,8 +1657,9 @@ class MrpProduction(models.Model):
             # the finish move can already be completed by the workorder.
             for move in finish_moves:
                 move.quantity = float_round(order.qty_producing - order.qty_produced, precision_rounding=order.product_uom_id.rounding, rounding_method='HALF-UP')
-                if move.has_tracking != 'none' and order.lot_producing_id:
-                    move.move_line_ids.lot_id = order.lot_producing_id
+                extra_vals = order._prepare_finished_extra_vals()
+                if extra_vals:
+                    move.move_line_ids.write(extra_vals)
             # workorder duration need to be set to calculate the price of the product
             for workorder in order.workorder_ids:
                 if workorder.state not in ('done', 'cancel'):
@@ -2712,6 +2713,12 @@ class MrpProduction(models.Model):
             clean_action(action, self.env)
             return action
 
+    def _prepare_finished_extra_vals(self):
+        self.ensure_one()
+        if self.lot_producing_id:
+            return {'lot_id' : self.lot_producing_id.id}
+        return {}
+
     def action_open_label_layout(self):
         view = self.env.ref('stock.product_label_layout_form_picking')
         return {