add

apps/server/src/models/post/utils.ts

@@ -156,6 +156,7 @@ export async function setCourseInfo({ data }: { data: Post }) {
         sections.map((section) => section.id).includes(descendant.parentId)
       );
     });
+
     sections.forEach((section) => {
       section.lectures = lectures.filter(
         (lecture) => lecture.parentId === section.id,