$metadata missing on dynamically registered models

[Remo]

I'm using a rather dynamic way to register my models. It's a a bit like shown here: https://github.com/xuzhg/WebApiSample/tree/main/v8.x/DynamicRouteSample

It's all working well till I want to get my meta information.

The linked project has the same problem.
I can query the data with something like this: http://localhost:5182/v1/people

This will then return the following JSON:

{
    "@odata.context": "http://localhost:5182/v1/$metadata#People",
    "value": [
        {
            "Id": 1,
            "Name": "Chilly",
            "Emails": [
                "[email protected]",
                "[email protected]"
            ]
        },
        {
            "Id": 2,
            "Name": "Mild",
            "Emails": [
                "[email protected]",
                "[email protected]"
            ]
        },
        {
            "Id": 3,
            "Name": "Balmy",
            "Emails": [
                "[email protected]",
                "[email protected]"
            ]
        },
        {
            "Id": 4,
            "Name": "Hot",
            "Emails": [
                "[email protected]",
                "[email protected]"
            ]
        }
    ]
}

As you can see, the odata context is http://localhost:5182/v1/$metadata#People, but when I try to open this, I only get a 404 response. I'm a bit lost, not sure where to start looking.

• Copilot suggested I add .AddOData(o => o.EnableQueryFeatures());, but no luck
• Google also didn't help
• Nothing relevant in this github project

[habbes]

Hello @Remo, I'm not sure I understand the problem. What is that you try to open that returns a 404 response? You've said that the endpoint http://localhost:5182/v1/people returns the JSON response you've shown above, where does the 404 come from?

[Remo]

@habbes I'm trying to see the metadata: http://localhost:5182/v1/$metadata#People The link listed in the JSON

[habbes]

@Remo thanks for the clarification. I had misunderstood the message. The /$metadata endpoint returns the schema of the service as defined in your IEdmModel. This endpoint is usually handled by a built-in controller that's registered when you call AddOData().

However, in the project that you have linked it seems it uses custom dynamic rooting, and not the built-in one. I have not gone through the entire codebase to see what could be missing, but an easy workaround would be to add a custom route in your controller to handle the $metadata endpoint and return the model:

public class AnyNameForController : Controller
{
    [HttpGet]
    [ODataRoute("$metadata")]
    public IEdmModel GetMetadata()
    {
        IODataFeature feature = Request.ODataFeature();
        string prefix = feature.RoutingConventionsStore["odata_prefix"] as string;
        
        return prefix == "v1" ? EdmModelBuilder.GetEdmModel1() : EdmModelBuilder.GetEdmModel2();
    }

    // ...
}

[Remo]

Thanks @habbes! Very much appreciated, it works.
Thanks @xuzhg Thanks for changing your sample so quickly. For reference xuzhg/WebApiSample@3836b45