update

mec-biz/src/main/java/com/ym/mec/biz/service/impl/MusicGroupServiceImpl.java

@@ -1920,6 +1920,10 @@ public class MusicGroupServiceImpl extends BaseServiceImpl<String, MusicGroup> i
             musicGroupPageInfo = queryPage(queryInfo);
         }
         List<MusicGroup> musicGroupList = musicGroupPageInfo.getRows();
+        
+        if(musicGroupList == null || musicGroupList.size() == 0){
+        	return musicGroupPageInfo;
+        }
         // 获取学校编号列表
 //        Set<Integer> schoolIds = musicGroupList.stream().map(e -> e.getSchoolId()).collect(Collectors.toSet());
 //        List<Map<Integer, String>> schoolNames = schoolDao.queryNameByIds(StringUtils.join(schoolIds,","));