修改delete方法

exam-work-domain/src/main/java/cn/com/qmth/examcloud/service/examwork/dao/ExamStudentRepo.java

@@ -52,5 +52,8 @@ public interface ExamStudentRepo extends JpaRepository<ExamStudent, Long>, Query
 
     List<ExamStudent> findByOrgId(Long orgId);
 
+    @Transactional
+    @Modifying
+    @Query("delete from ExamStudent s where s.exam.id = ?1")
     void deleteByExamId(Long examId);
 }