修改开团添加是否单乐器的选项

src/main/resources/config/mybatis/SchoolMapper.xml

@@ -74,7 +74,7 @@
 				name_ = #{name},
 			</if>
 			<if test="isSingle != null">
-				is_single = #{isSingle},
+				is_single_ = #{isSingle},
 			</if>
 		</set>
 		WHERE id_ = #{id}