修复：按发货状态读取当前余量

shierfeng-fastapi-backend/tests/module_business/test_shipment_service.py

@@ -253,7 +253,7 @@ class ShipmentInfrastructureContractTest(unittest.TestCase):
 
 
 class ShipmentDetailDaoTest(unittest.IsolatedAsyncioTestCase):
-    async def test_detail_loads_each_current_remaining_quantity_with_one_left_join(self) -> None:
+    async def test_draft_detail_loads_only_current_shippable_remaining_quantity_with_one_left_join(self) -> None:
         db = MagicMock(spec=AsyncSession)
         shipment = make_shipment(pallet_ids=(5, 2, 8))
         order_result = MagicMock()
@@ -288,12 +288,59 @@ class ShipmentDetailDaoTest(unittest.IsolatedAsyncioTestCase):
         )
         self.assertIn(
             'LEFT OUTER JOIN biz_pallet_inventory '
-            'ON biz_pallet_inventory.pallet_id = biz_shipment_item.pallet_id',
+            'ON biz_pallet_inventory.pallet_id = biz_shipment_item.pallet_id '
+            'AND biz_pallet_inventory.warehouse_id = 7 '
+            "AND biz_pallet_inventory.flow_state = 'FILLED_IN_WAREHOUSE' "
+            'AND biz_pallet_inventory.site_id IS NULL '
+            'AND biz_pallet_inventory.current_line_id IS NULL '
+            'AND biz_pallet_inventory.active_filling_id IS NOT NULL '
+            'AND biz_pallet_inventory.remaining_packages > 0',
             item_sql,
         )
         self.assertIn('WHERE biz_shipment_item.shipment_id = 12', item_sql)
         self.assertIn('ORDER BY biz_shipment_item.shipment_item_id', item_sql)
 
+    async def test_confirmed_detail_preserves_snapshot_and_does_not_read_current_inventory(self) -> None:
+        db = MagicMock(spec=AsyncSession)
+        shipment = make_shipment(status='CONFIRMED', pallet_ids=(5, 2))
+        shipment.items[0].active_filling_id = 105
+        shipment.items[0].package_qty = 13
+        shipment.items[1].active_filling_id = 102
+        shipment.items[1].package_qty = 6
+        order_result = MagicMock()
+        order_result.scalar_one_or_none.return_value = shipment
+        item_result = MagicMock()
+        item_result.all.return_value = [
+            (shipment.items[0], 1),
+            (shipment.items[1], 2),
+        ]
+        item_result.scalars.return_value.all.return_value = shipment.items
+        db.execute.side_effect = [order_result, item_result]
+
+        actual = await OperationDao.get_shipment_by_id(
+            db,
+            12,
+            warehouse_ids=[7],
+            site_ids=[9],
+        )
+
+        self.assertIs(shipment, actual)
+        self.assertEqual(2, db.execute.await_count)
+        self.assertEqual([13, 6], [item.package_qty for item in shipment.items])
+        self.assertEqual([None, None], [item.remaining_packages for item in shipment.items])
+        item_statement = db.execute.await_args_list[1].args[0]
+        item_sql = ' '.join(
+            str(
+                item_statement.compile(
+                    dialect=postgresql.dialect(),
+                    compile_kwargs={'literal_binds': True},
+                )
+            ).split()
+        )
+        self.assertNotIn('biz_pallet_inventory', item_sql)
+        self.assertIn('WHERE biz_shipment_item.shipment_id = 12', item_sql)
+        self.assertIn('ORDER BY biz_shipment_item.shipment_item_id', item_sql)
+
 
 class ShipmentControllerBootstrapTest(unittest.TestCase):
     def test_shipment_controller_module_exists(self) -> None: