Value objects as query parameters?

[roengstrom]

Hello!

I'm trying to use Refit in my project where I want to be able to supply a value object as a query parameter. However it doesn't seem to work - it just omits the parameter. Is that expected behaviour or is it a bug?

Here is my value object:

public readonly record struct CustomerId
{
    private readonly string _customerId;
    
    public CustomerId(string customerId)
    {
        _customerId = customerId ?? throw new NullReferenceException("CustomerId cannot be null");
        // (More validation is done here, but I've omitted here since it's irrelevant to the issue)
    }
    
    public override string ToString()
    {
        return _customerId;
    }
}

And here is my refit interface

public interface IMyApi
{
    [Get("/Items")]
    Task<ICollection<Item>> GetItemsForCustomer(
        [Query] CustomerId customerId
    );
}