在Fluent Migrator中回滚到以前的版本

问题描述

我正在尝试使用流利的migrator在我的项目中进行迁移.但是由于缺少文档，我正在努力找出如何回滚并为迁移类调用Down方法.

I am attempting to get migrations working with my project using fluent migrator. But due to the lack of documentation I am struggling to figure out how to rollback and have the Down method called for my migration class.

我使用初始版本1的类设置数据库:

I set up the db with an initial version 1 class:

[Migration(1)]
public class Baseline : Migration
{
    public override void Up()
    {
        Execute.Script("1_Baseline\\baseline.sql");
    }

    public override void Down() { }
}

我正在通过包含以下内容的批处理文件运行迁移:

I am running migrations via a batch file containing the following:

这很好.因此，我然后编写了第二个迁移类以进行测试:

This works fine. So I then wrote a second migration class just to test it out:

[Migration(2)]
public class AddNewTable : Migration
{
    public override void Up()
    {
        Create.Table("NewTable").WithColumn("name").AsString();
    }

    public override void Down()
    {
        Delete.Table("NewTable");
    }
}

再次运行批处理文件后，一切正常.然后，我查看了流畅的迁移器工具的命令行选项，并看到了--version选项.我假设要回滚到以前的版本，我只需提供--version 1即可调用AddNewTable的Down.但是，这没有发生.控制台仅显示提交事务"方法，然后关闭.但是该表尚未删除，版本号也没有更改.

Again after running the batch file, everything works ok. I then looked at the command line options for the fluent migrator tool, and saw a --version option. I assumed that to rollback to a previous version I would simply supply --version 1 and the Down of AddNewTable would be called. That, however, did not happent. The console simply displays a 'committing transaction` method then closes. But the table has not been deleted and the version number hasn't changed.

我是用错误的方式进行操作，还是有人可以看到我在执行此操作时的一些基本缺陷?

Am I doing this the wrong way or can anyone see some fundamental flaw in how I am doing this?

推荐答案

要向下迁移，请使用-t migrate:down.除了上下之外，migrate.exe的帮助还列出了回滚rollback:toversion和rollback:all.

To migrate down, you use -t migrate:down. Besides down and up, the help for migrate.exe also lists rollback, rollback:toversion and rollback:all.

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