How to unapply a migration in ASP.NET Core with EF Core

Question

When I run PM> Remove-Migration -context BloggingContext in VS2015 with an ASP.NET Core project using EF Core I get the following error:

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Answer 1

You should delete migration '20160703192724_MyFirstMigration' record from '_EFMigrationsHistory' table.

otherwise this command will remove migration and delete migrations folder:

   > remove-migration -force

Answer 2

In order to unapply a migration in EF Core 1.0 use the command:

dotnet ef database update {migration_name}

Use the migration name of the migration until which you would like to preserve your changes. The list of names of the migration can be found using:

dotnet ef migrations list

Answer 3

In general if you are using the Package Manager Console the right way to remove a specific Migration is by referencing the name of the migration

Update-Database -Migration {Name of Migration} -Context {context}

Another way to remove the last migration you have applied according to the docs is by using the command:

dotnet ef migrations remove

This command should be executed from the developer command prompt (how to open command prompt) inside your solution directory.

For example if your application is inside name "Application" and is in the folder c:\Projects. Then your path should be:

C:\Projects\Application

Answer 4

To completely remove all migrations and start all over again, do the following:

dotnet ef database update 0
dotnet ef migrations remove

Answer 5

in Package Manager Console, just Type Remove-Migration And Press Enter. It automatically removes the migration.

Tools -> Nuget Package Manager -> Package Manager Console

Answer 6

at first run the following command :

PM>update-database -migration:0

and then run this one :

PM>remove_migration

Finish