bug update

src/main/java/com/qmth/exam/reserve/service/impl/StudentApplyServiceImpl.java

@@ -892,7 +892,7 @@ public class StudentApplyServiceImpl extends ServiceImpl<StudentApplyDao, Studen
     public List<SignInVO> listSignInDate(Long taskId) {
         List<SignInVO> signInList = new ArrayList<>();
         ApplyTaskEntity task = null;
-        if (taskId == null) {
+        if (taskId != null) {
             task = applyTaskService.getById(taskId);
         } else {
             task = getApplyTask();