Fix state changes on stock items (#7976)

* Revert changes from https://github.com/inventree/InvenTree/pull/7965

* Add error handling for wrong key

* Add e2e test case for error condition
Fixes #7964

* Better code code / flow

* [BUG] Order of states in schema descriptions is not stable
Fixes #7977

src/backend/InvenTree/generic/states/fields.py

@@ -41,7 +41,7 @@ class CustomChoiceField(serializers.ChoiceField):
                 if self.is_custom:
                     return logical.key
                 return logical.logical_key
-            except ObjectDoesNotExist:
+            except (ObjectDoesNotExist, Exception):
                 raise serializers.ValidationError('Invalid choice')
 
     def get_field_info(self, field, field_info):
@@ -145,24 +145,32 @@ class InvenTreeCustomStatusSerializerMixin:
     def update(self, instance, validated_data):
         """Ensure the custom field is updated if the leader was changed."""
         self.gather_custom_fields()
+        # Mirror values from leader to follower
         for field in self._custom_fields_leader:
+            follower_field_name = f'{field}_custom_key'
             if (
                 field in self.initial_data
                 and self.instance
                 and self.initial_data[field]
-                != getattr(self.instance, f'{field}_custom_key', None)
+                != getattr(self.instance, follower_field_name, None)
             ):
-                setattr(self.instance, f'{field}_custom_key', self.initial_data[field])
+                setattr(self.instance, follower_field_name, self.initial_data[field])
+
+        # Mirror values from follower to leader
         for field in self._custom_fields_follower:
-            if (
+            leader_field_name = field.replace('_custom_key', '')
-                field in validated_data
+            if field in validated_data and leader_field_name not in self.initial_data:
-                and field.replace('_custom_key', '') not in self.initial_data
+                try:
-            ):
                     reference = get_logical_value(
                         validated_data[field],
                         self.fields[field].choice_mdl._meta.model_name,
                     )
-                validated_data[field.replace('_custom_key', '')] = reference.logical_key
+                    validated_data[leader_field_name] = reference.logical_key
+                except (ObjectDoesNotExist, Exception):
+                    if validated_data[field] in self.fields[leader_field_name].choices:
+                        validated_data[leader_field_name] = validated_data[field]
+                    else:
+                        raise serializers.ValidationError('Invalid choice')
         return super().update(instance, validated_data)
 
     def to_representation(self, instance):

src/backend/InvenTree/stock/test_api.py

@@ -1004,6 +1004,14 @@ class CustomStockItemStatusTest(StockAPITestCase):
         self.assertEqual(response.data['status'], self.status.logical_key)
         self.assertEqual(response.data['status_custom_key'], self.status.logical_key)
 
+        # Test case with wrong key
+        response = self.patch(
+            reverse('api-stock-detail', kwargs={'pk': pk}),
+            {'status_custom_key': 23456789},
+            expected_code=400,
+        )
+        self.assertIn('Invalid choice', str(response.data))
+
     def test_options(self):
         """Test the StockItem OPTIONS endpoint to contain custom StockStatuses."""
         response = self.options(self.list_url)

src/backend/InvenTree/templates/js/translated/stock.js

@@ -380,7 +380,7 @@ function stockItemFields(options={}) {
         batch: {
             icon: 'fa-layer-group',
         },
-        status: {},
+        status_custom_key: {},
         expiry_date: {
             icon: 'fa-calendar-alt',
         },

src/frontend/src/forms/StockForms.tsx

@@ -138,7 +138,7 @@ export function useStockFields({
         value: batchCode,
         onValueChange: (value) => setBatchCode(value)
       },
-      status: {},
+      status_custom_key: {},
       expiry_date: {
         // TODO: icon
       },