视频修改时，没有传文件id的视频，代表前端是要删除的视频

src/main/java/cn/chnmuseum/party/web/controller/VideoContentController.java

@@ -12,6 +12,7 @@ import cn.chnmuseum.party.service.*;
 import cn.chnmuseum.party.web.controller.base.BaseController;
 import com.alibaba.fastjson.JSONObject;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import io.swagger.annotations.Api;
@@ -134,6 +135,12 @@ public class VideoContentController extends BaseController {
         if (!languageList.contains(LanguageEnum.ZH.name())) {
             return getFailResult("视频文件必须包含汉语");
         }
+        //如果不上传文件id，就代表前端删除这个视频文件
+        LambdaQueryWrapper<Asset> assetWrapper = new QueryWrapper<Asset>().lambda()
+                .eq(Asset::getRefItemId, videoContent.getId())
+                .notIn(Asset::getId, videoFileIdList);
+        boolean remove = assetService.remove(assetWrapper);
+
         for (String videoFileId : videoFileIdList) {
             final Asset asset = this.assetService.getById(videoFileId);
             if (!asset.getPublished()) {