SSE optimistic update crashes on custom fields not yet in stale metadata cache

https://sonarly.com/issue/14352?type=bug

When a user creates custom fields on an object and then views that object's records, incoming SSE database events include the new fields, but the frontend metadata cache hasn't refreshed yet, causing a crash in the optimistic record computation.

Fix: **What changed:** In `computeOptimisticRecordFromInput.ts`, replaced the `throw new Error(...)` with `console.warn(...)` when unknown fields are detected in the record input (line 73-77).

**Why:** The function validates that all fields in `recordInput` exist in `objectMetadataItem.fields`. This validation was originally written for mutation-triggered optimistic updates where the frontend controls the input. When SSE real-time events were added (commit `d51c988a9e`, Jan 2026), this function started receiving server-controlled input that may include fields not yet known to the frontend's metadata cache — specifically when a user creates custom fields and immediately views records before the metadata refreshes.

The function's main for-loop (line 80) iterates only over `objectMetadataItem.fields`, so unknown fields in `recordInput` are already naturally skipped. The throw was a defensive assertion that became incorrect when the caller contract changed. Converting it to a warning preserves observability while allowing graceful degradation.

**Test update:** Updated the existing test from asserting a throw to asserting a `console.warn` call and verifying that known fields (like `city: 'Paris'`) are still correctly processed while unknown fields are skipped.

packages/twenty-front/src/modules/object-record/utils/__tests__/computeOptimisticRecordFromInput.test.ts

@@ -252,26 +252,34 @@ describe('computeOptimisticRecordFromInput', () => {
     });
   });
 
-  it('should throw an error if recordInput contains fields unrelated to the current objectMetadata', () => {
+  it('should warn and skip unknown fields if recordInput contains fields unrelated to the current objectMetadata', () => {
     const cache = new InMemoryCache();
     const personObjectMetadataItem = getMockObjectMetadataItemOrThrow('person');
+    const consoleWarnSpy = jest
+      .spyOn(console, 'warn')
+      .mockImplementation(() => {});
 
-    expect(() =>
-      computeOptimisticRecordFromInput({
-        currentWorkspaceMember,
-        objectMetadataItems: generatedMockObjectMetadataItems,
-        objectMetadataItem: personObjectMetadataItem,
-        recordInput: {
-          unknwon: 'unknown',
-          foo: 'foo',
-          bar: 'bar',
-          city: 'Paris',
-        },
-        cache,
-        objectPermissionsByObjectMetadataId: {},
-      }),
-    ).toThrowErrorMatchingInlineSnapshot(
-      `"Should never occur, encountered unknown fields unknwon, foo, bar in objectMetadataItem person"`,
+    const result = computeOptimisticRecordFromInput({
+      currentWorkspaceMember,
+      objectMetadataItems: generatedMockObjectMetadataItems,
+      objectMetadataItem: personObjectMetadataItem,
+      recordInput: {
+        unknwon: 'unknown',
+        foo: 'foo',
+        bar: 'bar',
+        city: 'Paris',
+      },
+      cache,
+      objectPermissionsByObjectMetadataId: {},
+    });
+
+    expect(consoleWarnSpy).toHaveBeenCalledWith(
+      expect.stringContaining('encountered unknown fields'),
     );
+    expect(result).toEqual({
+      city: 'Paris',
+    });
+
+    consoleWarnSpy.mockRestore();
   });
 });

packages/twenty-front/src/modules/object-record/utils/computeOptimisticRecordFromInput.ts

@@ -71,8 +71,8 @@ export const computeOptimisticRecordFromInput = ({
     },
   );
   if (unknownRecordInputFields.length > 0) {
-    throw new Error(
-      `Should never occur, encountered unknown fields ${unknownRecordInputFields.join(', ')} in objectMetadataItem ${objectMetadataItem.nameSingular}`,
+    console.warn(
+      `computeOptimisticRecordFromInput: encountered unknown fields ${unknownRecordInputFields.join(', ')} in objectMetadataItem ${objectMetadataItem.nameSingular}. Skipping unknown fields.`,
     );
   }