Autoquery join issues

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ServiceStack;
using ServiceStack.Data;
using ServiceStack.DataAnnotations;
using ServiceStack.OrmLite;

namespace OrmLiteTest
{
    class Program
    {
        static void Main(string[] args)
        {
            AppHost appHost = new AppHost();
            appHost.Init().Start("http://localhost:88/");

            JsonServiceClient client = new JsonServiceClient("http://localhost:88/");

            // Succeeds
            client.Get(new Request() { Id = 1 } );

            // Succeeds
            client.Get(new CustomRequest() { Id = 1 } );

            // Fails, with SQL error
            client.Get(new AutoQueryRequest());

            // Fails, but doesn't actually join
            client.Get(new AutoQueryRequest2());

            // Fails, with SQL error
            client.Get("autoquery2?format=json&SellerNameStartsWith=B");

            Console.ReadKey();
        }
    }

    public class MyService : Service
    {
        public IDbConnectionFactory dbFactory { get; set; }
        public IAutoQuery AutoQuery { get; set; }

        public QueryResponse<CustomPurchase> Any(AutoQueryRequest request)
        {
            var q = AutoQuery.CreateQuery(request, Request.GetRequestParams());
            return AutoQuery.Execute(request, q);
        }

        public QueryResponse<CustomPurchase> Any(AutoQueryRequest2 request)
        {
            var q = AutoQuery.CreateQuery(request, Request.GetRequestParams());
            return AutoQuery.Execute(request, q);
        }

        public Purchase Any(Request request)
        {
            IDbConnection db = dbFactory.OpenDbConnection();
            return db.SingleById<Purchase>(request.Id);
        }

        public CustomPurchase Any(CustomRequest request)
        {
            IDbConnection db = dbFactory.OpenDbConnection();
            return db.SingleById<CustomPurchase>(request.Id);
        }
    }

    [Route("/autoquery")]
    public class AutoQueryRequest : QueryBase<Purchase, CustomPurchase>, IJoin<Purchase, Seller>, IJoin<Purchase, Buyer>
    { }

    [Route("/autoquery2")]
    public class AutoQueryRequest2 : QueryBase<CustomPurchase>
    { }

    [Route("/test")]
    public class Request : IReturn<Purchase>
    {
        public int Id { get; set; }
    }

    [Route("/test2")]
    public class CustomRequest : IReturn<CustomPurchase>
    {
        public int Id { get; set; }
    }

    [Alias("Purchase")]
    public class CustomPurchase
    {
        public int Id { get; set; }
        public string Description { get; set; }
        public string SellerName { get; set; }
        public string BuyerName { get; set; }
    }

    [Alias("Person")]
    public class Buyer : Person {}
    
    [Alias("Person")]
    public class Seller : Person {}

    public class Purchase
    {
        public int Id { get; set; }
        public string Description { get; set; }
        [References(typeof(Person))]
        public int SellerId { get; set; }
        [References(typeof(Person))]
        public int BuyerId { get; set; }

        [Reference]
        public Person Buyer { get; set; }
        
        [Reference]
        public Person Seller { get; set; }
    }

    public class Person
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }

    public class AppHost : AppSelfHostBase
    {
        public AppHost()
            : base("TestApp", typeof(AppHost).Assembly)
        { }

        public override void Configure(Funq.Container container)
        {
            container.Register<IDbConnectionFactory>(
                new OrmLiteConnectionFactory(":memory:", SqliteDialect.Provider));

            using (var db = container.Resolve<IDbConnectionFactory>().Open())
            {
                db.DropAndCreateTable<Person>();
                db.DropAndCreateTable<Purchase>();

                db.InsertAll(testPersons);
                db.InsertAll(testPurchases);
            }

            Plugins.Add(new AutoQueryFeature() { MaxLimit = null });
        }

        private List<Person> testPersons = new List<Person>()
        {
            new Person() { Id = 1, Name = "Rose Tyler" }, new Person() { Id = 2, Name = "Martha Jones" }, new Person() { Id=3, Name="Donna Noble" }
        };

        private List<Purchase> testPurchases = new List<Purchase>() 
        { 
            new Purchase() { Id = 1, Description = "Sonic Screwdriver", BuyerId = 1, SellerId = 2 }, 
            new Purchase() { Id = 2, Description = "Bow Tie", BuyerId = 3, SellerId = 4 },
        };
    }
}