So to rollback to B you could use either: Update-Database -TargetMigration:"B"Īccording to this related answer on a similar question, correct command is -Target for EF Core 1.1 while it is -Migration for EF Core 2.0. The Update-Database command updates the database to the latest migration, meaning it will apply all pending migrations in the order they were added. It's used to apply changes to the database schema, updating it to match the current state of the Entity Framework model. This step is optional you can continue with the remaining tutorials without having deployed the project. Likewise, if you have applied migrations A, B, C, D, and E (in that order), then the ordinal 1 should refer to A, ordinal 2 should refer to B, and so on. The Update-Database command is an important part of Entity Framework migrations. The Migrations feature enables you to change the data model and deploy your changes to production by updating the database schema without having to drop and re-create the database. So in that case, you have to use the 0 (ordinal) value. Database Update > dotnet ef database update Usage: dotnet ef database update arguments options Arguments: The target migration.If you want to rollback all migrations and start over, you can use: Update-Database -Target:0Ä , above, would rollback even the FIRST migration ( this is a destructive command-be sure you know what you're doing before you use it!)-something you cannot do if you use the syntax above that requires the name of the target migration (the name of the 0th migration doesn't exist before a migration is applied!). Thus, if you use GET-MIGRATIONS and you find that you have A, B, C, D, and E, then using this command will rollback E and D to get you to C: Update-Database -TargetMigration:"C"Īlso, unless anyone can comment to the contrary, I noticed that you can use an ordinal value and the short -Target switch (thus, -Target is the same as -TargetMigration). What you are doing above is saying that you want to rollback all migrations UNTIL you're left with the migration specified. I will ping the product team to see if they can run the custom tool on the EDMX file when it is saved and recursively run on all the tt files associated with that EDMX parent.I want to add some clarification to this thread: Update-Database -TargetMigration:"name_of_migration" So anytime you find your EF model and/or class files out of sync with your database then you need to manually run the âRun Custom Toolâ command on both the. Entity Framework provided a nice GUI to update the Entity data model for Database First Approach but Entity Framework Core doesnt have any GUI to do the. So I selected the âRun Custom Toolâ on the tt file:Īnd that generated the correct object model: This would be fine if we want to apply the database migrations in. The migrations feature in EF Core provides a way to incrementally update the database schema to keep it in sync with the application's data model while preserving existing data in the database. So, I selected âRun Custom Toolâ from the T4 context menu:Ä«ut I still didnât have the Foo class in my object model: However, the dotnet ef command builds the source so it can apply the database updates. If you F4 the corresponding T4 file you can see that the custom tool associated with the T4 file is: TextTemplatingFileGenerator The most obvious choice is to select âRun Custom Toolâ from the EDMX file, but that doesnât do anything: But I discovered that thereâs a context menu item called âRun Custom Toolâ. Up until today I would have recreated the EDMX file, which is a big pain. I then go back to my app and add my new table to the model using the âUpdate Model from Databaseâ¦â feature:Ä«ut the corresponding object model and CS file wasnât generated: ef core db update entity framework rollback to initial migration entity framework core create initial migration rollback ef migration force dotnet ef database update command when to add migration in asp.net core execute migration ef core ef migration revert database migration in entity framework core dotnet entity framework core initial migratio. (The Update Model from Database option doesnât update the object model and class files)įor example, letâs say I start with this model:Īnd I add a new table to the DB called Foo: The biggest beef I have with it is that the models can get out of sync with the database and saving the EDMX file and running the âUpdate Model from Databaseâ¦â feature doesnât work. Well, I should say it is awesome MOST of the time. Iâve been building apps for a really long time and have used all the frameworks that have come out over the years. The ADO.NET Entity Framework is an awesome way to quickly pull data into an app.
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