fix

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

@@ -196,7 +196,7 @@ public class ImUserFriendServiceImpl extends BaseServiceImpl<Long, ImUserFriend>
 
         MusicGroup musicGroup = musicGroupDao.get(musicGroupId);
         // 更新学校端乐团主管的群好友列表
-        if (musicGroup.getCooperationOrganId() != null) {
+        if (musicGroup != null && musicGroup.getCooperationOrganId() != null) {
             // 获取乐团主管
             List<SchoolStaff> schoolStaffs = schoolStaffMapper.getByCoopIdAndType(musicGroup.getCooperationOrganId(), ESchoolStaffType.ORCHESTRA_LEADER);
 
@@ -218,11 +218,9 @@ public class ImUserFriendServiceImpl extends BaseServiceImpl<Long, ImUserFriend>
                     userFriends(imUserFriends, musicGroup.getName(), staffUserId, userIds);
                 }
             }
-
-        }
-        // 更新学校端好友列表
-        if (musicGroup.getCooperationOrganId() != null) {
+            // 更新学校端好友列表
             imUserFriends.addAll(schoolStaffFriend(musicGroup.getCooperationOrganId()));
+
         }