A clean way to use required value types in ASP.NET Core

How do you deal with required value types in input models without having to make all of them nullable?

For a long time, the only solutions out there suggested:

• Using [BindRequired], which doesn't work for body data.
• Using something like [Range], which only works for integers and only if they cannot be zero.
• Just making all your properties nullable, which is ugly.

But you can actually get your input models looking like this by making a custom value provider & model binder:

record InputModel
{
    [Required(ErrorMessage = "Optional custom error")]
    public int NonNullableInteger { get; init; }
}

The entire tutorial is kept updated on my blog, alongside source code and an example project: https://thom.ee/blog/clean-way-to-use-required-value-types-in-asp-net-core/