如何撤消上一个添加迁移命令？

我已经使用 Add-Migration命令创建了一个迁移，但是我想更改该迁移的名称。如何撤消迁移命令，以便使用所需的新名称重新生成它？

这只是一个删除生成的文件的问题，还是这可能是一个坏主意？

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最佳答案

If you haven't used Update-Database you can just delete the migration file. If you've run the update you should roll it back using Update-Database -TargetMigration "NameOfPreviousMigration" then delete the migration file.

Reference:

http://elegantcode.com/2012/04/12/entity-framework-migrations-tips/

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If you haven't executed the migration yet with Update-Database, you can run Add-Migration again with the same name (you may need to use -Force) to re-execute the scaffolding. This is noted in the output of the Add-Migration command.

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With EntityFrameworkCore 2.0 comes the model snapshot. You will need to run the remove migration command in order to update the model snapshot. I have read that EF Core will recognize any update and revert the snapshot for you if you manually delete the migration but this has not worked for me.

https://learn.microsoft.com/en-us/aspnet/core/data/ef-mvc/migrations

https://learn.microsoft.com/en-us/ef/core/miscellaneous/cli/dotnet#dotnet-ef-migrations-remove

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To add to @Ben 's answer, when using the dotnet ef command variety this is the remove command you need:

dotnet ef migrations remove

Which will remove your last migration and update the model snapshot.

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Just use command

Remove-migration

It will remove last added migration and update snapshot. It will not affect database so you have to rollback db in first place.

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Update your last perfect migration via this command :

Update-Database –TargetMigration

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Just use command:

Update-Database nameMigration -context nameContext

And Then

Remove-migration -Context nameContext