Comments on: Enhancing Claims with Owin Middleware & Claims Transformation https://www.cognim.co.uk/transforming-claims-claimsprincipal/ Enterprise system implementation. Making the complex simple Sat, 09 Jul 2016 17:37:31 +0000 hourly 1 By: whoever https://www.cognim.co.uk/transforming-claims-claimsprincipal/#comment-198 Sat, 09 Jul 2016 17:37:31 +0000 http://www.cognim.co.uk/?p=5385#comment-198 Nice article. I was doing exactly that in my project, but the implementation you and IdentityModel present seems more elegant.

There’s only one issue, when I inject a micro ORM database (NPOCO) into where your IUserDataProvider is, it blows up, complaining something about ClaimPrincipal. I wasn’t even touching the claim principal, just calling the database and assign result to a local variable. Not sure why. You probably didn’t see it if you do database DI in the next layer from IUserDataProvider

I ended up changing the transformation class to something like this

public static IAppBuilder UseClaimsTransformation(this IAppBuilder app, string idType,
Func<string, Task<List>> transformation)

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