From cee51f16ff7a70efd0e06a4134d6603bedfbbb43 Mon Sep 17 00:00:00 2001
From: Maria Florencia Besteiro Gonzalez
 <florencia.besteiro-gonzalez@overleaf.com>
Date: Mon, 26 Jan 2026 13:52:07 +0100
Subject: [PATCH] Merge pull request #30750 from
 overleaf/mfb-migration-improve-handling-of-debug-projects

Create index to search for debug projects.

GitOrigin-RevId: 58c5ff47c6053f03dcd54c88d06d022fcb78d626
---
 services/web/app/src/models/Project.mjs       |  1 +
 ...114135706_create-debug-project-indexes.mjs | 31 +++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 tools/migrations/20260114135706_create-debug-project-indexes.mjs

diff --git a/services/web/app/src/models/Project.mjs b/services/web/app/src/models/Project.mjs
index e7a4b3968f..aa767f2f1b 100644
--- a/services/web/app/src/models/Project.mjs
+++ b/services/web/app/src/models/Project.mjs
@@ -88,6 +88,7 @@ export const ProjectSchema = new Schema(
         rangesSupportEnabled: { type: Boolean },
         otMigrationStage: { type: Number },
       },
+      isDebugCopyOf: { type: ObjectId },
     },
     collabratecUsers: [
       {
diff --git a/tools/migrations/20260114135706_create-debug-project-indexes.mjs b/tools/migrations/20260114135706_create-debug-project-indexes.mjs
new file mode 100644
index 0000000000..d9997ffe01
--- /dev/null
+++ b/tools/migrations/20260114135706_create-debug-project-indexes.mjs
@@ -0,0 +1,31 @@
+/* eslint-disable no-unused-vars */
+
+import Helpers from './lib/helpers.mjs'
+
+const tags = ['saas']
+
+const indexes = [
+  {
+    key: { 'overleaf.isDebugCopyOf': 1, owner_ref: 1, lastUpdated: 1 },
+    name: 'owner_ref_1_lastUpdated_1_debugCopies',
+    partialFilterExpression: {
+      'overleaf.isDebugCopyOf': { $type: 'objectId' },
+    },
+  },
+]
+
+const migrate = async client => {
+  const { db } = client
+  await Helpers.addIndexesToCollection(db.projects, indexes)
+}
+
+const rollback = async client => {
+  const { db } = client
+  await Helpers.dropIndexesFromCollection(db.projects, indexes)
+}
+
+export default {
+  tags,
+  migrate,
+  rollback,
+}