Debug code-first Entity Framework migration codes

Question

I\'m using Entity Framework code first in my website and I\'m just wondering if there is any way to debug the migration codes. You know, like setting breakpoints and stuff l

Answer 1

Here's a more fail-proof method which will do the trick without much fuss:

Step#1: Place this piece of code right above the migration you want to debug:

public partial class ORACLE_Test : DbMigration
{
    public override void Up()
    {
        if (!System.Diagnostics.Debugger.IsAttached)
            System.Diagnostics.Debugger.Launch();

        AddColumn("TEST", "UR_USER_ID", x => x.Decimal(nullable: false, precision: 11, scale: 0, storeType: "number"));
        AddColumn("TEST", "UR_CLIENT_ID", x => x.Decimal(nullable: false, precision: 11, scale: 0, storeType: "number"));
        [...]
    }

    public override void Down()
    {
    }
}

Step#2: Compile the project containing your migrations

Step#3: Open a console inside the output directory (/bin/Debug, /bin/Release etc) containing the dll of your migrations

Step#4: Invoke migrate.exe with the /scriptFile parameter to launch the debugger and actually debug the desired db-migration

migrate.exe "Your.Migrations.Assembly.dll" /scriptFile="foo.sql" /verbose /startupConfigurationFile="Your.Migrations.Assembly.config"

Once the debugger-selector dialog pops up pick the visual studio instance that you have already opened.