购买bug修改

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

@@ -290,7 +290,7 @@ public class MemberRankSettingServiceImpl extends BaseServiceImpl<Integer, Membe
 
 		Integer userId = studentPaymentOrder.getUserId();
 
-		Student student = studentService.get(userId);
+		Student student = studentService.getLocked(userId);
 		if (student == null) {
 			throw new BizException("学员信息不存在");
 		}