Test manual correction of invalid import rows (#13260)

Co-authored-by: trippiez <trippiez@users.noreply.github.com>

src/backend/InvenTree/importer/tests.py

@@ -782,6 +782,79 @@ class ImportAPITest(ImporterMixin, InvenTreeAPITestCase):
         # Check that there are new database records
         self.assertEqual(PartCategory.objects.count(), N + 4)
 
+    def test_manual_correction_revalidates_import_row(self):
+        """Import manually corrected data instead of the invalid CSV value."""
+        from part.models import Part
+        from stock.models import StockItem
+
+        part = Part.objects.create(
+            name='Manual correction test part',
+            description='Target part for a corrected import row',
+        )
+        initial_count = StockItem.objects.count()
+        self.assignRole('stock.change')
+
+        # Upload a row containing an invalid part reference.
+        session_data = self.post(
+            reverse('api-importer-session-list'),
+            {
+                'model_type': 'stockitem',
+                'data_file': ContentFile(
+                    'Part,Quantity\nunknown-part,5\n', 'manual_correction.csv'
+                ),
+            },
+            format='multipart',
+            expected_code=201,
+        ).data
+        session_id = session_data['pk']
+
+        # Accept the column mapping to extract and validate the CSV row.
+        self.post(
+            reverse('api-import-session-accept-fields', kwargs={'pk': session_id}),
+            expected_code=200,
+        )
+
+        row = DataImportRow.objects.get(session_id=session_id)
+        self.assertFalse(row.valid)
+        self.assertFalse(row.complete)
+        self.assertIn('part', row.errors)
+        self.assertEqual(row.row_data['Part'], 'unknown-part')
+        self.assertEqual(StockItem.objects.count(), initial_count)
+
+        original_row_data = row.row_data.copy()
+        corrected_data = {**row.data, 'part': part.pk}
+
+        # Correct the part reference through the same API used by the UI.
+        response = self.patch(
+            reverse('api-importer-row-detail', kwargs={'pk': row.pk}),
+            {'data': corrected_data},
+            format='json',
+            expected_code=200,
+        )
+        self.assertTrue(response.data['valid'])
+        self.assertFalse(response.data['errors'])
+
+        # The correction must persist and clear the previous validation error.
+        row.refresh_from_db()
+        self.assertEqual(row.data['part'], part.pk)
+        self.assertTrue(row.valid)
+        self.assertFalse(row.errors)
+        self.assertFalse(row.complete)
+        self.assertEqual(row.row_data, original_row_data)
+        self.assertEqual(StockItem.objects.count(), initial_count)
+
+        # Confirm the corrected row and check the actual imported record.
+        self.post(
+            reverse('api-import-session-accept-rows', kwargs={'pk': session_id}),
+            {'rows': [row.pk]},
+            format='json',
+            expected_code=201,
+        )
+
+        self.assertEqual(StockItem.objects.count(), initial_count + 1)
+        item = StockItem.objects.get(part=part)
+        self.assertEqual(item.quantity, 5)
+
     def test_column_mapping_lookup_field(self):
         """Test that the 'lookup_field' option can be specified via the column-mapping API."""
         f = self.helper_file('companies.csv')