优化代码

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

@@ -601,13 +601,13 @@ public class CourseGroupServiceImpl extends ServiceImpl<CourseGroupDao, CourseGr
                 .eq(CourseGroup::getId, groupId)
                 .eq(CourseGroup::getType, CourseScheduleEnum.LIVE.getCode())
         );
+        if (Objects.isNull(courseGroup)) {
+            throw new BizException("课程组不存在！");
+        }
         //只要不是销售中的课程组都提示无法购买
         if (!courseGroup.getStatus().equals(CourseGroupEnum.APPLY.getCode())) {
             throw new BizException("课程已结束销售！");
         }
-        if (Objects.isNull(courseGroup)) {
-            throw new BizException("课程组不存在！");
-        }
         //课程信息
         List<CourseSchedule> courseList = courseScheduleService.list(Wrappers.<CourseSchedule>lambdaQuery()
                 .eq(CourseSchedule::getCourseGroupId, groupId));