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

There is a simple Solution for your problem

public class UserCreate
{
    [Required(AllowEmptyStrings = false)]
    public string Username { get; set; }
}

Here AllowEmptyStrings = false can be used for your validation