Getting related entities ASP.NET WebApi OData v4 results in “No HTTP resource was found that matches the request URI”

Question

I followed this asp.net tutorial by Mike Wasson, and managed to set up the related entities just fine, but when I applied this logic to my project the more complex entity re

Answer 1

I am using ASP.NET 5, Web API 2.2, and Entity Framework.

Another developer and I have also spent hours trying to figure out why, after following that same tutorial to a T, we couldn't get a relational route like the following to return anything other than a 404:

/odata/Supplier(1)/Products

We also tried the route debugger referenced in the OP, and it failed to produce anything other than a blank screen.

Luckily, for our needs, one of our random experiments worked, and that was to use the ODataRoute attribute like such:

    [EnableQuery]
    [ODataRoute("Suppliers({key})/Products")]
    public IQueryable GetProductsForSupplier([FromODataUri] int key)
    {
        ...
    }