fix: allow unit_id to be empty string

init-db/src/main/resources/db/changelog/0.21/20230614_changeset.xml

@@ -0,0 +1,31 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<!--
+ APITable <https://github.com/apitable/apitable>
+ Copyright (C) 2022 APITable Ltd. <https://apitable.com>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+	  http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.8.xsd">
+
+    <changeSet id="V0.21-20230614-001" author="Zoe" labels="unit">
+        <comment>add uuid column to unit</comment>
+        <sql>
+            ALTER TABLE `${table.prefix}unit` MODIFY `unit_id` varchar(64) COLLATE utf8mb4_unicode_ci DEFAULT '' COMMENT 'unit show id';
+        </sql>
+    </changeSet>
+</databaseChangeLog>

init-db/src/main/resources/db/changelog/0.21/master.xml

@@ -23,4 +23,5 @@
         xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.8.xsd">
 
     <include file="db/changelog/0.21/20230517_changeset.xml"/>
+    <include file="db/changelog/0.21/20230614_changeset.xml"/>
 </databaseChangeLog>