..

menduner/menduner-system-biz/src/main/java/com/citu/module/menduner/system/service/votingactivity/VotingActivityJoinItemServiceImpl.java

@@ -75,6 +75,7 @@ public class VotingActivityJoinItemServiceImpl implements VotingActivityJoinItem
             VotingActivityJoinItemDO votingActivityJoinItemDO = votingActivityJoinItemMapper.selectById(id);
             VotingActivityJoinItemDetailVO bean = BeanUtils.toBean(votingActivityJoinItemDO, VotingActivityJoinItemDetailVO.class);
             Integer parentNum = votingActivityJoinItemMapper.getParentNum(votingActivityJoinItemDO.getVotingActivityId(), bean.getVotingActivityJoinItemNum());
+            parentNum = null==parentNum?0:parentNum;
             bean.setParentVotingActivityJoinItemNumSubtract(bean.getVotingActivityJoinItemNum()-parentNum);
             return bean;
         }