refactor(study): 优化班级查询的数据库关联结构

web-infrastructure/src/main/resources/mapper/study/ClassMapper.xml

@@ -99,7 +99,8 @@
             class c
                 left join training_type t on t.training_type_id = c.train_type
                 left join corp_info ci on ci.id = c.corpinfo_id
-                left join user u on u.id = c.teacher_id
+                left join teacher tea on c.teacher_id = tea.id
+                LEFT JOIN user u ON u.id = tea.user_id
                 <if test="menuPerms != null and menuPerms != null and menuPerms != '' and menuPerms = 'xgfd-yqyd'">
                     left join student s on s.class_id = c.class_id and s.delete_enum = 'FALSE'
                 </if>