NH Movies Service

using System.Collections.Generic;
using System.Linq;
using NHibernate.Criterion;
using ServiceStack.Common;
using ServiceStack.NH.Core.Domain;
using ServiceStack.ServiceInterface;
using ServiceStack.ServiceInterface.ServiceModel;

namespace ServiceStack.NH.Web.App_Start
{
    public class MovieDto
    {
        public int? Id { get; set; }
        public string Title { get; set; }
        public int? DirectorId { get; set; }
        public string DirectorName { get; set; }
        public string Genre { get; set; }
    }

    public class Movies
    {
        public string Genre { get; set; }
        public MovieDto Movie { get; set; }
    }

    public class MoviesResponse : IHasResponseStatus
    {
        public MoviesResponse()
        {
            Movies = new List<MovieDto>();
            ResponseStatus = new ResponseStatus();
        }

        public IList<MovieDto> Movies { get; set; }

        public MovieDto Movie { get; set; }

        public ResponseStatus ResponseStatus { get; set; }
    }

    public class MoviesService : RestServiceBase<Movies>
    {
        public NHibernate.ISession NhSession { get; set; }

        /// <summary>
        /// GET /movies 
        /// GET /movies/genres/{Genre}
        /// </summary>
        public override object OnGet(Movies request)
        {
            IList<MovieDto> movies = new List<MovieDto>();
            if (!request.Genre.IsNullOrEmpty())
            {
                movies = NhSession.QueryOver<Movie>()
                    .WhereRestrictionOn(x => x.Genre)
                    .IsInsensitiveLike(request.Genre, MatchMode.Start).List().Select(
                        AutoMapper.Mapper.Map<Movie, MovieDto>).ToList();
            }
            else
            {
                movies = NhSession.QueryOver<Movie>().List()
                    .Select(AutoMapper.Mapper.Map<Movie, MovieDto>).ToList();
            }
            var response = new MoviesResponse
                               {
                                   Movies = movies
                               };

            return response;
        }

        public override object OnPut(Movies request)
        {
            var movie = request.Movie.TranslateTo<Movie>();
            if (request.Movie.DirectorId.HasValue)
            {
                var director = NhSession.Get<Director>(request.Movie.DirectorId);
                if (director != null)
                    movie.Director = director;
            }
            NhSession.Save(movie);

            var response = new MoviesResponse
            {
                Movie = AutoMapper.Mapper.Map<Movie,MovieDto>(movie) //movie.TranslateTo<MovieDto>()
            };

            return response;
        }

        public override object OnPost(Movies request)
        {
            var movie = NhSession.Get<Movie>(request.Movie.Id);
            movie.PopulateWith(request.Movie);
            if (request.Movie.DirectorId.HasValue)
            {
                var director = NhSession.Get<Director>(request.Movie.DirectorId);
                if (director != null)
                    movie.Director = director;
            }

            NhSession.Update(movie);
            NhSession.Flush();

            var response = new MoviesResponse
            {
                Movie = AutoMapper.Mapper.Map<Movie, MovieDto>(movie) //movie.TranslateTo<MovieDto>()
            };

            return response;
        }
    }
}