fix typo and bug on exam edit. It was throwing an exception if it found an id with the same owners, but should throw when the owners are different. It was also throwing an error if owners was not set in exam.

src/pages/api/exam/[module]/index.ts

@@ -40,13 +40,13 @@ async function GET(req: NextApiRequest, res: NextApiResponse) {
 }
 
 async function POST(req: NextApiRequest, res: NextApiResponse) {
-	const user = await requestUser(req, res)
+	const user = await requestUser(req, res);
 	if (!user) return res.status(401).json({ ok: false });
 
 	const { module } = req.query as { module: string };
 
 	const session = client.startSession();
-	const entities = isAdmin(user) ? [] : mapBy(user.entities, 'id')
+	const entities = isAdmin(user) ? [] : mapBy(user.entities, "id");
 
 	try {
 		const exam = {
@@ -64,8 +64,16 @@ async function POST(req: NextApiRequest, res: NextApiResponse) {
 			// owners, throw exception if there is, else allow editing
 			const ownersSet = new Set(docSnap?.owners || []);
 
-			if (docSnap !== null && docSnap?.owners?.length === exam.owners.lenght && exam.owners.every((e: string) => ownersSet.has(e))) {
+			if (docSnap !== null) {
-				throw new Error("Name already exists");
+				if (docSnap.owners === undefined) {
+					docSnap.owners = [];
+				}
+				if (exam.owners === undefined) {
+					exam.owners = [];
+				}
+				if (docSnap.owners?.length !== exam.owners?.length || !exam.owners?.every((e: string) => ownersSet.has(e))) {
+					throw new Error("Name already exists");
+				}
 			}
 
 			await db.collection(module).updateOne(
@@ -73,13 +81,12 @@ async function POST(req: NextApiRequest, res: NextApiResponse) {
 				{ $set: { id: req.body.id, ...exam } },
 				{
 					upsert: true,
-					session
+					session,
 				}
 			);
 		});
 
 		res.status(200).json(exam);
-
 	} catch (error) {
 		console.error("Transaction failed: ", error);
 		res.status(500).json({ ok: false, error: (error as any).message });