fix videoList

app/service/course/v5/institution.js

@@ -406,7 +406,7 @@ class InstitutionSubService extends Service {
     const classId = input.class_id || 0;
     const userUuid = ctx.userUuid;
 
-    const videoList = await ctx.classModel.V5.CourseV5Video.findAll({ where: { class_id: classId, status: 1, is_deleted: 0 }, attributes: [ 'id', 'class_id', 'title', 'time', 'cover_image', 'is_free' ], order: [[ 'sort', 'asc' ]] });
+    const videoList = await ctx.classModel.V5.CourseV5Video.findAll({ where: { class_id: classId, status: 1, is_deleted: 0 }, attributes: [ 'id', 'class_id', 'title', 'time', 'cover_image', 'is_free' ], order: [[ 'sort', 'asc' ]], raw: true });
 
     let latestVideoId = 0;
     let valid = 0;