优化订单导出接口

mec-biz/src/main/resources/config/mybatis/StudentRegistrationMapper.xml

@@ -591,9 +591,9 @@
     <select id="findStudentByMusicGroupIdAndUserId" resultMap="StudentRegistration">
         SELECT sr.*,s.name_ school_name_,s2.name_ subject_name_,mgsp.kit_group_purchase_type_ kit_group_purchase_type_ FROM student_registration sr
         LEFT JOIN music_group mg ON mg.id_ =sr.music_group_id_
-        LEFT JOIN school s on mg.school_id_ = s.id_
-        LEFT JOIN subject s2 on sr.subject_id_ = s2.id_
-        LEFT JOIN music_group_subject_plan mgsp on mg.id_ = sr.subject_id_
+        LEFT JOIN school s ON mg.school_id_ = s.id_
+        LEFT JOIN subject s2 ON sr.subject_id_ = s2.id_
+        LEFT JOIN music_group_subject_plan mgsp ON mgsp.subject_id_ = sr.subject_id_
         WHERE sr.music_group_id_ = #{musicGroupId} AND sr.user_id_ = #{userId} AND sr.music_group_status_ != 'QUIT' LIMIT 1
     </select>
 </mapper>