[FIX] rma_sale_lot: force ml reservation to the restricted lot

rma_sale_lot/models/__init__.py

@@ -1,2 +1,3 @@
 from . import sale_order_line
 from . import sale_order
+from . import rma

rma_sale_lot/models/rma.py

@@ -0,0 +1,16 @@
+# Copyright 2025 ACSONE SA/NV
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class Rma(models.Model):
+
+    _inherit = "rma"
+
+    def action_confirm(self):
+        res = super().action_confirm()
+        restricted_moves = self.reception_move_id.filtered("restrict_lot_id")
+        for ml in restricted_moves.move_line_ids:
+            ml.lot_id = ml.move_id.restrict_lot_id
+        return res

rma_sale_lot/tests/test_rma_sale_lot.py

@@ -49,6 +49,8 @@ def test_partial_return(self):
         self.assertEqual(rma_1.reception_move_id.restrict_lot_id, self.lot_1)
         self.assertEqual(rma_2.reception_move_id.restrict_lot_id, self.lot_2)
         self.assertEqual(rma_2.product_uom_qty, 1)
+        self.assertEqual(rma_1.reception_move_id.move_line_ids.lot_id, self.lot_1)
+        self.assertEqual(rma_2.reception_move_id.move_line_ids.lot_id, self.lot_2)
 
     def test_full_return_after_partial_return(self):
         self.test_partial_return()