what is wrong with my code first migration? - ef-code-first

Question

This is my migration and seeding code:
internal sealed class Configuration : DbMigrationsConfiguration<AuthDb>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
ContextKey = "Service.DAL.AuthDb";
}
}
public class CreateOrRunMigrations: CreateDatabaseIfNotExists<AuthDb>
{
public override void InitializeDatabase(AuthDb context)
{
base.InitializeDatabase(context);
var migrator = new DbMigrator(new Migrations.Configuration());
migrator.Update();
}
protected override void Seed(AuthDb context)
{
base.Seed(context);
// add Default product and company
}
}
The context is constructed this way
public class AuthDb : DbContext
{
public AuthDb() : base("name=xxx")
{
Database.SetInitializer(new CreateOrRunMigrations());
Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;
Configuration.AutoDetectChangesEnabled = true;
}
}
What I want is:
When the database is created first time, the seeding data is added.
When I make a change in the model, the migration code will apply the changes to the database automatically.
When I make a change (e.g. Company), and use update_database to add a migration in the console, the migration file was created. But when the code is run, I got an error complaining that my model and database doesn't match any more.
Of course it doesn't match as I just made a change and I was hoping that the migration will apply the change. However, it didn't. What I did wrong?

Answer 1

Your initializer derives from CreateDatabaseIfNotExists so it's only going to run when the database does not exist. Try making it derive from MigrateDatabaseToLatestVersion:
public class CreateOrRunMigrations: MigrateDatabaseToLatestVersion<AuthDb>
{
// no need for InitializeDatabase override since that's what this initializer does...
protected override void Seed(AuthDb context)
{
base.Seed(context);
// add Default product and company
}
}