fix：班级调整，课程表没有写入老师

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

@@ -407,8 +407,9 @@
 
     <!-- 获取乐团声部下的学生 -->
     <select id="findMusicGroupStudent" resultMap="StudentRegistration">
-        SELECT sr.*,cg.name_ class_group_name_ FROM student_registration sr
+        SELECT sr.*,cg.name_ class_group_name_,su.gender_ gender_ FROM student_registration sr
         LEFT JOIN class_group cg ON cg.id_ = sr.class_group_id_
+        LEFT JOIN sys_user su on sr.user_id_ = su.id_
         WHERE sr.music_group_id_ = #{musicGroupId}
         <if test="actualSubjectId != null">
             AND sr.actual_subject_id_ = #{actualSubjectId}