fix: define get_row_parent() for OrderView

tests/web/views/test_orders.py

@@ -1503,6 +1503,28 @@ class TestOrderView(WebTestCase):
             self.assertEqual(len(items), 1)
             self.assertEqual(items[0].product_scancode, "07430500132")
 
+    def test_get_row_parent(self):
+        model = self.app.model
+        enum = self.app.enum
+        view = self.make_view()
+
+        user = model.User(username="barney")
+        self.session.add(user)
+        order = model.Order(order_id=42, created_by=user)
+        self.session.add(order)
+        self.session.flush()
+        item = model.OrderItem(
+            product_id="07430500132",
+            product_scancode="07430500132",
+            order_qty=1,
+            order_uom=enum.ORDER_UOM_UNIT,
+            status_code=enum.ORDER_ITEM_STATUS_INITIATED,
+        )
+        order.items.append(item)
+        self.session.flush()
+
+        self.assertIs(view.get_row_parent(item), order)
+
     def test_configure_row_grid(self):
         model = self.app.model
         enum = self.app.enum