ModelState.IsValid even when it should not be?

Question

I have API where I need to validate my user model. I choose an approach where I create different classes for Create/Edit actions to avoid mass-assignment and divide validati

Answer 1

What I did was to create an Attribute along with an ActionFilter and a Extension Method to avoid null models.

The extension method looks for parameters with the NotNull attribute and check if they are null, if true, they are instantiated and set in the ActionArguments property.

This solution can be found here: https://gist.github.com/arielmoraes/63a39a758026b47483c405b77c3e96b9