增加乐器采购清单确认接口

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

@@ -342,7 +342,7 @@
     </select>
     <select id="findNoClassSubjects" resultMap="ClassGroup">
         SELECT cg.* FROM class_group cg LEFT JOIN class_group_relation cgr ON cgr.sub_class_group_id_=cg.id_
-        WHERE cg.music_group_id_=#{musicGroupId} AND cg.type_ = 'NORMAL' AND cg.del_flag_ = '0' AND cgr.sub_class_group_id_ IS NULL
+        WHERE cg.music_group_id_=#{musicGroupId} AND cg.type_ = 'NORMAL' AND cg.del_flag_ = '0' AND cgr.id_ IS NULL
     </select>
 
     <select id="countTeacherNum" resultType="java.lang.Integer">