补充

ruoyi-modules/guoyan-platform/src/main/java/org/dromara/platform/service/impl/NoticeInfoServiceImpl.java

@@ -128,6 +128,10 @@ public class NoticeInfoServiceImpl implements INoticeInfoService {
     public Boolean updateByBo(NoticeInfoBo bo) {
         NoticeInfo update = MapstructUtils.convert(bo, NoticeInfo.class);
         validEntityBeforeSave(update);
+        List<Attachment> attachments = bo.getAttachments();
+        AttachmentSerializer serializer = new AttachmentSerializer();
+        String serializedAttachment = serializer.serializeAttachments(attachments);
+        update.setAttachment(serializedAttachment);
         return baseMapper.updateById(update) > 0;
     }