Generate IEnumerable<long> for navigation properties instead of full objects

[RohitM-IN]

Hi,

I noticed in PR #47 (saw this late: #12) that you’re adding support for including navigation properties in generated DTOs.

I have a use case where instead of including the full navigation objects, I’d like to include only their IDs in the generated DTOs.

For example, given a model like this:

public class Category
{
    public int Id { get; set; }
    public string Name { get; set; } = null!;
    public virtual ICollection<Product> Products { get; set; } = new List<Product>();
}

I’d like the generated CreateDto / UpdateDto to look like:

public record CategoryCreateDto
{
    public string Name { get; init; } = null!;
    public IEnumerable<long> ProductIds { get; init; } = new();
}

Is there a way to configure Facet so that navigation collections are represented as lists of IDs in the generated DTOs?

[Tim-Maes]

Hi @RohitM-IN

Currently, this can be achieved with a little workaround by using an extra property on the facet, and assign Ids through a custom mapper:

[Facet(typeof(Category),
    exclude: ["Products"], 
    Configuration = typeof(CategoryCreateDtoMapper))]
public partial record CategoryCreateDto
{
    public IEnumerable<long> ProductIds { get; init; } = new List<long>();
}

// Generates your DTO with the ProductIds property, but excludes the Products.

public class CategoryCreateDtoMapper : IFacetMapConfiguration<Category, CategoryCreateDto>
{
    public static void Map(Category source, CategoryCreateDto target)
    {
        target.ProductIds = source.Products?.Select(p => (long)p.Id) ?? Enumerable.Empty<long>();
    }
}

But as of today, there is no build-in support to have your navigation properties generated like that out of the box.

[RohitM-IN]

What if i want to use [GenerateDtos(Types = DtoTypes.All, OutputType = OutputType.Record)] is there any way in that