Fluent NHibernate - Create database schema only if not existing

Question

I have an application where I use Fluent Nhibernate to create my database. This far I\'ve been recreating the database schema each time. The code that does this is this:

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Answer 1

You can just use SchemaUpdate instead, it will update the schema if it exists and create it if it does not:

public NhibernateSessionFactory(IPersistenceConfigurer config)
{
    _sessionFactory = Fluently.Configure().
        Database(config).
        Mappings(m => m.FluentMappings.AddFromAssemblyOf()).
        ExposeConfiguration(cfg => new SchemaUpdate(cfg).Execute(false, true)).
        BuildSessionFactory();
}

One caveat: SchemaUpdate does not do destructive updates (dropping tables, columns, etc.). It will only add them.