1、陪练课调整

mec-biz/src/main/java/com/ym/mec/biz/service/impl/StudentCourseHomeworkServiceImpl.java

@@ -73,7 +73,7 @@ public class StudentCourseHomeworkServiceImpl extends BaseServiceImpl<Long, Stud
 	@Override
 	@Transactional(rollbackFor = Exception.class)
 	public int update(StudentCourseHomework bean) {
-		if(Objects.isNull(bean)){
+		if(Objects.isNull(bean)||Objects.isNull(bean.getId())){
 			throw new BizException("作业不存在");
 		}
 		super.update(bean);