fix: preserve seed data _id as stable record id across page refreshes

Fixes: record not found when refreshing detail page

Root cause: syncDriverIds() unconditionally set _id = id, overwriting
seed data's stable _id values with driver-generated timestamp-based ids.
On page refresh, the in-memory kernel reboots with new generated ids,
making old URL record ids invalid.

Changes:
- syncDriverIds now promotes seed _id to canonical id when present
- findOne $expand path handles array results defensively
- Added tests verifying stable seed ids and HTTP fetch by _id

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

apps/console/src/__tests__/MSWServer.test.tsx

@@ -95,4 +95,33 @@ describe('MSW Server Integration', () => {
       expect(record.priority).toBe('high');
     }
   });
+
+  // ── Stable seed-data IDs ──────────────────────────────────────────────
+  // Seed records carry an explicit `_id`. After kernel bootstrap and
+  // syncDriverIds(), `id` should equal the seed `_id`, NOT a random
+  // driver-generated value. This ensures URLs with record IDs remain
+  // valid across page refreshes.
+
+  it('should preserve seed _id as canonical id (stable across refreshes)', async () => {
+    const driver = getDriver();
+    const opportunities = await driver!.find('opportunity', { object: 'opportunity' });
+    expect(opportunities.length).toBeGreaterThan(0);
+
+    // Seed data defines _id "101" for the first opportunity.
+    // After syncDriverIds, id must equal _id (both "101").
+    const first = opportunities.find((r: any) => r._id === '101');
+    expect(first).toBeDefined();
+    expect(first.id).toBe('101');
+    expect(first._id).toBe('101');
+  });
+
+  it('should fetch a seed record by _id via HTTP', async () => {
+    // GET /data/opportunity/101 — uses the stable seed _id
+    const res = await fetch('http://localhost/api/v1/data/opportunity/101');
+    expect(res.ok).toBe(true);
+    const body = await res.json();
+    const record = body.data?.record ?? body.record;
+    expect(record).toBeDefined();
+    expect(record.name).toBe('ObjectStack Enterprise License');
+  });
 });

apps/console/src/mocks/createKernel.ts

@@ -102,14 +102,23 @@ async function installBrokerShim(kernel: ObjectKernel): Promise<void> {
  * generated identity as `id`. Seed data may also carry its own
  * `_id` that differs from the driver-assigned `id`.
  *
- * This helper ensures every record has `_id === id` so that
- * protocol lookups via `_id` match the driver-assigned `id`.
+ * When seed data provides an explicit `_id`, that value is promoted
+ * to `id` so that record identifiers remain stable across page
+ * refreshes (the driver would otherwise generate a new timestamp-based
+ * `id` every time the in-memory kernel reboots).
+ *
+ * When no explicit `_id` exists, `_id` is derived from the
+ * driver-assigned `id` so protocol lookups still work.
  */
 function syncDriverIds(driver: InMemoryDriver): void {
   const db = (driver as any).db as Record<string, any[]>;
   for (const records of Object.values(db)) {
     for (const record of records) {
-      if (record.id) {
+      if (record._id != null && record._id !== record.id) {
+        // Seed data carries an explicit _id → promote it to canonical id
+        record.id = record._id;
+      } else if (record.id) {
+        // No explicit seed _id → derive _id from driver-assigned id
         record._id = record.id;
       }
     }

packages/data-objectstack/src/index.ts

@@ -289,6 +289,10 @@ export class ObjectStackAdapter<T = unknown> implements DataSource<T> {
           $top: 1,
         };
         const result = await this.rawFindWithPopulate(resource, findParams);
+        // Handle array responses (some servers return data as flat arrays)
+        if (Array.isArray(result)) {
+          return result[0] || null;
+        }
         const resultObj = result as { records?: T[]; value?: T[] };
         const records = resultObj.records || resultObj.value || [];
         return records[0] || null;