fixed bug：后台配置的推荐视频未生效

src/main/resources/mappers/management/courseMapper.xml

@@ -87,13 +87,14 @@
         c.`name` course_name,
         c.logo_url course_logo_url,
         c.charge_model,
-        c.allow
+        c.allow,
+        IF(r.sort_no IS NULL,10000000,r.sort_no) sort_no
         from course c
         LEFT JOIN recommend_config r on r.course_id = c.id
         WHERE c.is_del = 0
         and  c.`status` = 'UP'
         and c.allow = 'ALL'
-        ORDER BY r.sort_no ASC,c.create_time DESC
+        ORDER BY sort_no ASC,c.create_time DESC
     </select>
     <select id="findListByTags" resultType="com.qkdata.biz.management.entity.CoursePO">
         SELECT c.*