Nested Interface Projection Not Working #258
Description
Hello,
Using .Net Core 3.1 and EF Core 3.1.6.
Given the following entities
public class Product
{
public int Id { get; set; }
public string? Name { get; set; }
public decimal BasePrice { get; set; }
public virtual ICollection<ProductTarif> ProductTarifs { get; set; }
}
public class Tarif
{
public int Id { get; set; }
public decimal Value { get; set; }
public virtual ICollection<ProductTarif> ProductTarifs { get; set; }
}And the following interfaces
public interface IProduct
{
int Id { get; set; }
string Name { get; set; }
decimal BasePrice { get; set; }
ICollection<ITarif> Tarifs { get; set; }
}
public interface ITarif
{
int Id { get; set; }
decimal Value { get; set; }
}And the following configuration
TypeAdapterConfig<Tarif, ITarif>.NewConfig().PreserveReference(true);
TypeAdapterConfig<Product, IProduct>
.NewConfig()
.Map(p => p.Tarifs, p => p.ProductTarifs.Select(pt => pt.Tarif))
.PreserveReference(true);I'd expect for the following projection to work, as it does with the object references and Adapt<>,
var projection = ctx.Products.AsNoTracking()
.Include(p => p.ProductTarifs)
.ThenInclude(p => p.Tarif)
.Take(1)
.ProjectToType<IProduct>()
.FirstOrDefault();
But instead I'm presented with an exception:
System.ArgumentException: 'Expression of type 'System.Linq.Expressions.Expression`1[System.Func`2[Tryouts.Common.Tarif,GeneratedType_2]]' cannot be used for parameter of type 'System.Linq.Expressions.Expression`1[System.Func`2[Tryouts.Common.Tarif,Tryouts.Common.ITarif]]' of method 'System.Linq.IQueryable`1[Tryouts.Common.ITarif] Select[Tarif,ITarif](System.Linq.IQueryable`1[Tryouts.Common.Tarif], System.Linq.Expressions.Expression`1[System.Func`2[Tryouts.Common.Tarif,Tryouts.Common.ITarif]])' (Parameter 'arg1')'
Am I doing something wrong?
Greatly appreciate your help.