fix(be): migration for mysql

Author: fiftin

db/bolt/migration.go

@@ -37,6 +37,8 @@ func (d *BoltDb) ApplyMigration(m db.Migration) (err error) {
 	switch m.Version {
 	case "2.8.26":
 		err = migration_2_8_28{migration{d.db}}.Apply()
+	case "2.8.40":
+		err = migration_2_8_40{migration{d.db}}.Apply()
 	}
 
 	if err != nil {

db/sql/migrations/v2.8.39.sql

@@ -1,22 +1,8 @@
-alter table `task` change `build_task_id` `build_task_id_old` int;
-
-alter table `task` add column `build_task_id` int;
-
-update `task` set `build_task_id` = `build_task_id_old` where `build_task_id_old` is not null;
-
-update `task` set `build_task_id_old` = null where `build_task_id_old` is not null;
-
 alter table `task`
     add constraint `task_build_task_id_fk_y38rt`
         foreign key (`build_task_id`) references `task` (`id`)
             on delete set null;
 
-alter table `task` drop foreign key if exists `task_ibfk_2`;
-
-alter table `task` drop column `build_task_id_old`;
-
-
-
 
 create table `project__template_backup_385025846` (
     id int,