Int migration fix (#3323)

* Add fix for stock migration

- Ensure the serial number is not too large when performing migration
- Add unit test for data migration

(cherry picked from commit 661fbf0e3d)

* Add similar fixes for PO and SO migrations

(cherry picked from commit bde23c130c)

* And similar fix for BuildOrder reference field

(cherry picked from commit ca0f4e0031)

* Update unit tests for API plugin mixin class

- API at previous target URL has changed
- Simplier to use the github API as a test case

(cherry picked from commit dfe3172b7d)

* Revert test database name

(cherry picked from commit 53333c29c3)

* Override default URL behaviour for unit test

(cherry picked from commit 2c12a69529)

InvenTree/order/migrations/0052_auto_20211014_0631.py

@@ -23,6 +23,10 @@ def build_refs(apps, schema_editor):
             except Exception:  # pragma: no cover
                 ref = 0
 
+        # Clip integer value to ensure it does not overflow database field
+        if ref > 0x7fffffff:
+            ref = 0x7fffffff
+
         order.reference_int = ref
         order.save()
 
@@ -40,6 +44,10 @@ def build_refs(apps, schema_editor):
             except Exception:  # pragma: no cover
                 ref = 0
 
+        # Clip integer value to ensure it does not overflow database field
+        if ref > 0x7fffffff:
+            ref = 0x7fffffff
+
         order.reference_int = ref
         order.save()
 

InvenTree/order/test_migrations.py

@@ -49,6 +49,19 @@ class TestRefIntMigrations(MigratorTestCase):
             with self.assertRaises(AttributeError):
                 print(sales_order.reference_int)
 
+        # Create orders with very large reference values
+        self.po_pk = PurchaseOrder.objects.create(
+            supplier=supplier,
+            reference='999999999999999999999999999999999',
+            description='Big reference field',
+        ).pk
+
+        self.so_pk = SalesOrder.objects.create(
+            customer=supplier,
+            reference='999999999999999999999999999999999',
+            description='Big reference field',
+        ).pk
+
     def test_ref_field(self):
         """Test that the 'reference_int' field has been created and is filled out correctly."""
         PurchaseOrder = self.new_state.apps.get_model('order', 'purchaseorder')
@@ -63,6 +76,15 @@ class TestRefIntMigrations(MigratorTestCase):
             self.assertEqual(po.reference_int, ii)
             self.assertEqual(so.reference_int, ii)
 
+        # Tests for orders with overly large reference values
+        po = PurchaseOrder.objects.get(pk=self.po_pk)
+        self.assertEqual(po.reference, '999999999999999999999999999999999')
+        self.assertEqual(po.reference_int, 0x7fffffff)
+
+        so = SalesOrder.objects.get(pk=self.so_pk)
+        self.assertEqual(so.reference, '999999999999999999999999999999999')
+        self.assertEqual(so.reference_int, 0x7fffffff)
+
 
 class TestShipmentMigration(MigratorTestCase):
     """Test data migration for the "SalesOrderShipment" model."""