update

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

@@ -612,6 +612,6 @@
     <select id="getFirstEduTeacherId" resultType="java.lang.Integer">
         SELECT mg.educational_teacher_id_ FROM student_registration sr
         LEFT JOIN music_group mg ON mg.id_ = sr.music_group_id_
-        WHERE user_id_ = #{userId} AND mg.status_ != 'CANCELED' AND sr.music_group_status_ != 'QUIT' LIMIT 1
+        WHERE user_id_ = #{userId} AND mg.status_ != 'CANCELED' AND sr.music_group_status_ != 'QUIT' AND mg.educational_teacher_id_ IS NOT NULL LIMIT 1
     </select>
 </mapper>

mec-student/src/main/java/com/ym/mec/student/controller/RepairController.java

@@ -17,7 +17,6 @@ import com.ym.mec.biz.service.*;
 import com.ym.mec.common.controller.BaseController;
 import com.ym.mec.common.entity.HttpResponseResult;
 import com.ym.mec.common.exception.BizException;
-import com.ym.mec.common.page.QueryInfo;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.beans.factory.annotation.Autowired;