Entity Framework: Add-Migration fails with Unable to update database

Question

I have been using Entity Framework (5.0) for a while now in a project (ASP.NET MVC in VS2012 Express). Right now, though, I am no longer able to add migrations.

Answer 1

You can reset the entity framework to solve your problem [But keep it mind it will bring the Migration to the default state]

Note: To take a backup before performing the following

You need to delete the present state:

• Delete the migrations folder in your project
• Delete the __MigrationHistory table in your database (may be under system tables)

You will find the __MigrationHistory table in your database [Under App_Data Folder]

Then run the following command in the Package Manager Console:

Enable-Migrations -EnableAutomaticMigrations -Force

Use with or without -EnableAutomaticMigrations

And finally, you can run:

Add-Migration Initial

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