ServiceStack.OrmLite“ LoadSelect”不能加载IEnumerable引用吗？

Question

Given the following abbreviated DTO's...

public class Order
{
    public int ID { get; set; }
    [References(typeof(Customer))]
    public int? CustomerID { get; set; }
    [Reference]
    public List<OrderItem> OrderItems { get; set; }        
}

public class OrderItem
{
    public int ID { get; set; }
    [References(typeof(Order))]
    public int? OrderID { get; set; }
    public string ProductID { get; set; }

    [Reference]
    public Product Product { get; set; }
}

...with the following service...

[Route("/orders", "GET")]
public class GetOrders : IReturn<IEnumerable<Order>>
{
    public int? Page { get; set; }
    public int? Show { get; set; }
}

public class OrderService : Service
{
    public List<Order> Get(GetOrders request)
    {
        var query = Db.From<Order>()
            .OrderByDescending(q => q.ID)
            .Limit(request.Page.GetValueOrDefault(0) * request.Show.GetValueOrDefault(25), request.Show.GetValueOrDefault(25));

        return Db.LoadSelect(query);
    }
}

The LoadSelect will properly load the Customer reference, but it will not load the OrderItems reference. Is there a way to force it to? I've tried throwing in a Join to force it, but anything I try seems to either bomb because of the OrderBy and Limit, or it will return the entire dataset before limiting which kills performance.

Am I missing something, or is this not supported?

Answer 1

Firstly I recommend using Id naming convention instead of ID when using ServiceStack libraries.

This looks like it's a similar issue to the loading reference data with LoadSelect in SqlServer in a paged query that has been resolved in the latest v4.0.34+ which is now available on MyGet .