fix

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/service/impl/VideoLessonGroupServiceImpl.java

@@ -552,6 +552,9 @@ public class VideoLessonGroupServiceImpl extends ServiceImpl<VideoLessonGroupDao
     public void update(VideoLessonVo lessonVo, SysUser sysUser) {
         VideoLessonGroup lessonGroup = lessonVo.getLessonGroup();
         List<VideoLessonGroupDetailDto> lessonList = lessonVo.getLessonList();
+        if (CollectionUtils.isEmpty(lessonList)) {
+            lessonList = new ArrayList<>();
+        }
         lessonGroup.setLessonCount(lessonList.size());
         lessonGroup.setTeacherId(sysUser.getId());
         //判断是否有正在审核中