Get all CustomAttributes from Method and Controller inside IDocumentFilter, swashbuckle asp net core, swagger

Question

Versions:

• Project: ASP Net Core 2.1, Web API
• Packages: Swashbuckle.AspNetCore (4.0.1)

Problem:

I have created one CheckIncludeForOperationFilter class, which inherits from Swashbuckle.AspNetCore.Swagger.IDocumentFilter and implements the only method this interface requires - public void Apply(SwaggerDocument swaggerDoc, DocumentFilterContext context).

What this class should do?
It should search for IncludeForAttribute. That means I should check if the action in the API has this attribute or the whole controller.

What I have?

public class CheckIncludeForOperationFilter : IDocumentFilter
{
    public void Apply(SwaggerDocument swaggerDoc, DocumentFilterContext context)
    {            
        foreach (var apiDescription in context.ApiDescriptions)
        {

        }
    }
}

Here things get interesting when I start the program in debug mode, I can clearly see what the object apiDescription has. And it contains everything that I search. Here are the action attributes:

apiDescription.ActionDescriptor.MethodInfo.CustomAttributes

and all Controller Attributes:

apiDescription.ActionDescriptor.MethodInfo.DeclaringType.CustomAttributes

The thing is, the compiler shows the property MethodInfo in debug, but it is missing when I write it. It is highlighted in red and I don't have access to it:

How can I get all the attributes?

Cheers

Panoptic

Answer 1

You can try this approach:

MethodInfo methodInfo;
var ss = apiDescription.TryGetMethodInfo(out methodInfo);
var controllerFilters = methodInfo.DeclaringType.CustomAttributes;
var actionFilters = methodInfo.DeclaringType.CustomAttributes;

and you will get your custom attributes.

Marrero

It looks like this extension method TryGetMethodInfo does not exist in older versions of Swashbuckle. If you're stuck on an old version like me, try ApiDescription.ControllerAttributes() and ApiDescription.ActionAttributes(). – Thor