graduation: fix constructor and fetching

1 files changed, 2 insertions, 3 deletions

diff --git a/src/graduation-prod.ts b/src/graduation-prod.ts
index 5fe9bf8..2d4087f 100644
--- a/src/graduation-prod.ts
+++ b/src/graduation-prod.ts
@@ -8,11 +8,10 @@ const _graduationChangesPromise = (async function () {
 	let entries = await db.fetchEntries();
 	for (const e of entries) {
 		const gradChange = GraduationChange.fromDBEntry(e);
-		const studentChanges = changes.get(gradChange.studentId);
-		if (studentChanges === null) {
+		if (!changes.has(gradChange.studentId)) {
 			changes.set(gradChange.studentId, [gradChange]);
 		} else {
-			studentChanges.push(gradChange);
+			changes.get(gradChange.studentId).push(gradChange);
 		}
 	}
 	return changes;