FIX: Handle case where no lines need procurement in _action_launch_stock_rule

Author: bosd

sale_order_add_byproduct/models/sale_order_line.py

@@ -16,8 +16,14 @@ def _action_launch_stock_rule(self, previous_product_uom_qty=False):
         # Filter out lines that were added as MO by-products
         # Only trigger stock rules for lines that are NOT by-product lines
         lines_to_procure = self.filtered(lambda line: not line.is_mrp_byproduct_line)
-
+        
         # Call the super method with only the filtered lines
-        return super(SaleOrderLine, lines_to_procure)._action_launch_stock_rule(
-            previous_product_uom_qty=previous_product_uom_qty
-        )
+        # If no lines need procurement, we still need to return the proper result
+        if lines_to_procure:
+            return super(SaleOrderLine, lines_to_procure)._action_launch_stock_rule(
+                previous_product_uom_qty=previous_product_uom_qty
+            )
+        else:
+            # If no lines need procurement, return the same type of result that super would return
+            # This is typically True for success
+            return True