OfType<T>() is broken

Describe the bug I am trying to implment a wrapper around your client and am running into issues w/the OfType<T>() method. I’m trying to replicate the How_many_pets_does_everybody_have() method from the test project. I am getting a different result than you are. I am pointing to the same Database and Graph and have the same object model in both projects.

The OfType<T>() when T is a base class (i.e., Pet) is expected to reflect and determine any classes that inherit from it and should return a list of Types (i.e., Dog, Cat, Pet).

Your test project produces: V().hasLabel('Person').out('Owns').hasLabel('Cat','Dog','Pet') which is correct and what I expect.

My implementation produces: V().hasLabel('Person').out('Owns').hasLabel('Pet') which is incorrect.

I have the same exact code, same class model, but different output. I tried cloning your repo and fixing whatever the issue is in the OfType<T>() extension but the solution won’t build.

Here is my code and some screenshots showing what’s going on:

1. My code is on left
2. Your sample project is on the right
3. You will see that I don’t get Cat or Dog

Pet

Mammal

Vertex

Dog

Cat

[danielcweber]

For an ASP WebApi, you’re probably better off with the other sample app.

[danielcweber]

For the ExRam.Gremlinq project not building, I cannot reproduce. Everything builds fine in VS 2022 and on the build server.

In your sample code, the only configuration of a GraphModel is, for whatever reason, commented out and reads

GraphModel
    .FromBaseTypes<Vertex, Edge>(lookup => lookup
        .IncludeAssembliesOfBaseTypes())

Gremlinq has no ability to lookup all the Pet-derived classes when it only considers the assembly of Vertex and Edge, which are not in the same assembly as Pet or anything else, as far as I can see. There’s a method to include more assemblies.