fix

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/service/impl/DiscountCardRecordServiceImpl.java

@@ -108,7 +108,7 @@ public class DiscountCardRecordServiceImpl extends ServiceImpl<DiscountCardRecor
         // 更新学生时长
         studentService.lambdaUpdate()
                 .set(Student::getDiscountEndTime, discountCardRecord.getEndTime())
-                .set(student.getDiscountStartTime() == null,Student::getDiscountStartTime, discountCardRecord.getEndTime())
+                .set(student.getDiscountStartTime() == null,Student::getDiscountStartTime, discountCardRecord.getStartTime())
                 .eq(Student::getUserId, orderDetailVo.getUserId())
                 .update();