添加迁移错误 [英] Errors on Add-Migration

问题描述

几周前，我在项目上启用了迁移，并在AspNetUsers表中添加了"ClientID"列.

A few weeks ago I enabled migration on my project and added a column 'ClientID' to the AspNetUsers table.

现在我正尝试添加另一列:名称".

Now I'm trying to add another column: "Name".

我在程序包管理器控制台中运行了此命令:

I ran this command in the Package Manager Console:

PM> Add-Migration "Name"

我收到以下错误:

由于以下原因，无法生成显式迁移显式迁移尚在等待中:[20161081751088_InitialCreate，20161091825212_ClientID].应用待处理的显式迁移尝试生成新的显式迁移之前.

Unable to generate an explicit migration because the following explicit migrations are pending: [20161081751088_InitialCreate, 20161091825212_ClientID]. Apply the pending explicit migrations before attempting to generate a new explicit migration.

我运行了一个更新命令:

I ran an update command:

PM> Update-Database

但是:

数据库中已经有一个名为"AspNetRoles"的对象.

There is already an object named 'AspNetRoles' in the database.

我在线研究并找到了该解决方案:

I researched online and found this solution:

PM> Add-Migration InitialMigrations -IgnoreChanges

但是后来我又遇到了第一个错误:

But then I got the first error again:

由于以下原因，无法生成显式迁移显式迁移尚在等待中:[20161081751088_InitialCreate，20161091825212_ClientID].应用待处理的显式迁移尝试生成新的显式迁移之前.

Unable to generate an explicit migration because the following explicit migrations are pending: [20161081751088_InitialCreate, 20161091825212_ClientID]. Apply the pending explicit migrations before attempting to generate a new explicit migration.

我该如何解决这个问题?

How can I solve this problem?

推荐答案

1. 删除项目中的迁移"文件夹

1. Remove the Migrations folder in your project

从数据库中删除 _MigrationHistory 表.

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