Complex or-query using QueryOver API

I have a (simplified) class hierarchy such as this:

public class Order
{
    public Customer Customer { get; set; }
    public Address Address { get; set; }
}
public class Custom开发者_如何学JAVAer
{
    public Address Address { get; set; }
}
public class Address
{
    public string CompanyName { get; set; }
    public string City { get; set; }
    public string Zip { get; set; }
}

Now I need to query Orders that match on either CompanyName, City or Zip of the Address - but on either the Order or the associated Customer.

I have gotten as far as:

public IList<Order> FindOrders(string search, ISession session)
{
    var orders = session.QueryOver<Order>()
          .Where(o => o.Address.City == search || o.Address.Zip == search || o.CompanyName == search).List();
}

How do I include the customer?

Do you mean the customer address? If so, I think you're looking for something like this:

public IList<Order> FindOrders(string search, ISession session)
{
    var orders = session.QueryOver<Order>(() => orderAlias)
          .JoinAlias(() => orderAlias.Customer, () => customerAlias)
          .Where(() => orderAlias.Address.City == search || orderAlias.Address.Zip == search || orderAlias.CompanyName == search)
          .Or(() => customerAlias.Address.City == search || customerAlias.Address.Zip == search || customerAlias.CompanyName == search)
          .List();
}

If you find you're writing a lot of queries like this, you may want to consider doing some kind of fulltext search to make your life easier (I'd recommend lucene.net, possibly via NHibernate.Search)