I\'ve configured my WebAPI ODATA service (using 5.0.0-rc1 for $expand and $select support) and everything seems to work fine but navigation properties.
The metadata does
You must define a foreign key as Breeze associations require FKs. http://www.breezejs.com/documentation/navigation-properties
[EDIT]
Your bi-directional association should look like this:
public class Mandate
{
public int Id { get; set; }
public string PolicyNumber { get; set; }
public virtual ICollection<OpenPosition> OpenPositions { get; set; }
}
public class OpenPosition {
public int Id { get; set; }
public decimal Amount { get; set; }
public int MandateId { get; set; }
public Mandate Mandate {get; set; }
}