![]() How to unapply a migration in ASP.NET Core with EF Core.Note: if the migration you want to unapply, does not contain a specific column or table, which are already in your database applied and being used, the column or table will be dropped, and your data will be lost.Īfter reverting the migration, you can remove your unwanted migration or, update your database to a specified migration (which is basically unapplying or reverting the non chosen migrations) with dotnet ef database update.create a new migration dotnet ef migrations add and apply it, which is recommended by microsoft.does not delete the migration file from your project, but allows you to remove it after unapplying.removes unwanted changes from the database.unapplying migrations (revert migrations): Note: removing a migration works only, if you didn't execute yet dotnet ef database update or called in your c# code database.migrate(), in other words, only if the migration is not applied to your database yet. to remove last created migration: cd to_your_project then dotnet ef migrations remove.removing a migration can only be done, if the migration is not applied to the database.removing a migration deletes the file from your project (which should be clear for everyone).net core 3.1, but should be compatible with all other generations as well removing migrations: So i'll write down a clear explanation, and what you have to notice.Īll the commands will be written using dotnet. I don't understand why we are confusing things up here. use the remove commands to remove them from the project. Note: this will not remove the migration files related to mysecondmigration. this will also remove mysecondmigration entry from the _efmigrationshistory table in the database. The above command will revert the database based on a migration named myfirstmigration and remove all the changes applied for the second migration named mysecondmigration. in this case, use the update-database command to revert the database to the specified previous migration snapshot.ĭotnet ef database update myfirstmigration. but, for some reason, you want to revert the database to the previous state. Suppose you changed your domain class and created the second migration named mysecondmigration using the add-migration command and applied this migration to the database using the update command. if the migration has been applied to other databases, consider reverting its changes using a new migration. The migration has already been applied to the database. please note that if a migration is already applied to the database, then it will throw the following exception. The above commands will remove the last migration and revert the model snapshot to the previous migration. use the following remove commands to remove the last created migration files and revert the model snapshot. You can remove the last migration if it is not applied to the database. In our case run the remove migration command twice. If you haven't applied the migration to the db ![]() Note: since we have two bad migrations run the remove migration command twice. eg: update-database -migration lastgoodmigration Note: the name should be without date prefix. If you have already applied the migration to the db like in the question ![]() Let's say you have the following migrations in your code: these commands are for package manager console. As the question itself deals with a first migration this answer is for anyone who is here looking for way to revert their last migration since most answers do not cover the alternate scenarios (for most of us it's not our first migration and we cannot wipe the entire migration history). ![]()
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