Question

I have a hierarchy of objects, Order, Contact, Address:

public class Order {      public virtual Contact BillingContact { get; set; } }  public class Contact {      public virtual Address Address { get; set; } } 

I want to query an order by id, and eager load the billingcontact, along with it’s address.

var criteria = DetachedCriteria.For<Order>()      .SetFetchMode('BillingContact', FetchMode.Eager) 

This criteria eager loads the BillingContact, but understandably not the address of the BillingContact. If i add:

     .SetFetchMode('BillingContact.Address', FetchMode.Eager) 

This does nothing to help.

Also note that these relationships are unidirectional:

public OrderMap() {     References(x => x.BillingContact)         .Not.Nullable()         .Cascade.All(); }  public ContactMap() {     HasOne(x => x.Address)         .Cascade.All()         .FetchType.Join(); }  public AddressMap() {     Map(x => x.Address1); }  

How can I construct a criteria object that will load the child of the child? Do these relationship mappings seem correct?

Answer 1

I believe you might need to add an alias to BillingContact to allow you access to it’s Address.

Something like:

var criteria = DetachedCriteria.For<Order>()   .CreateAlias('BillingContact', 'bc')   .SetFetchMode('BillingContact', FetchMode.Eager)   .SetFetchMode('bc.Address', FetchMode.Eager)