[FIX] rma: set route for out procurment

rma/models/rma.py

@@ -1219,7 +1219,9 @@ def _group_delivery_if_needed(self):
 
     def _prepare_outgoing_procurement_vals(self, warehouse=None, scheduled_date=None):
         values = self._prepare_common_procurement_vals(warehouse, scheduled_date)
-        values.update({"rma_id": self.id})
+        values.update(
+            {"rma_id": self.id, "route_ids": self.warehouse_id.rma_out_route_id}
+        )
         return values
 
     def _prepare_delivery_procurement_vals(self, scheduled_date=None):

rma/models/stock_warehouse.py

@@ -28,8 +28,8 @@ class StockWarehouse(models.Model):
         comodel_name="stock.location",
         string="RMA Location",
     )
-    rma_in_route_id = fields.Many2one("stock.location.route", "RMA in Route")
-    rma_out_route_id = fields.Many2one("stock.location.route", "RMA out Route")
+    rma_in_route_id = fields.Many2one("stock.route", "RMA in Route")
+    rma_out_route_id = fields.Many2one("stock.route", "RMA out Route")
 
     def _get_rma_location_values(self, vals, code=False):
         """this method is intended to be used by 'create' method

rma/tests/test_rma.py

@@ -555,6 +555,13 @@ def test_mass_return_to_customer(self):
         self.assertEqual(len(pick_1), 1)
         self.assertEqual(len(pick_2), 1)
         self.assertNotEqual(pick_1, pick_2)
+        self.assertEqual(pick_1.picking_type_id, self.warehouse.rma_out_type_id)
+        self.assertEqual(pick_1.location_id, self.warehouse.rma_loc_id)
+        self.assertEqual(pick_2.picking_type_id, self.warehouse.rma_out_type_id)
+        self.assertEqual(pick_2.location_id, self.warehouse.rma_loc_id)
+        self.assertEqual(len(pick_1), 1)
+        self.assertEqual(len(pick_2), 1)
+        self.assertNotEqual(pick_1, pick_2)
         self.assertEqual((pick_1 | pick_2).mapped("state"), ["assigned"] * 2)
         # One picking per partner
         self.assertNotEqual(pick_1.partner_id, pick_2.partner_id)