How do you deal with required value types in input models without having to make all of them nullable?
Implementation & sample controller are provided.
Read the article/tutorial here.
Copy over the RequiredValueTypes folder to your project.
Then add the following line, somewhere after any other services that change MvcOptions:
builder.Services.UseExplicitRequiredValueTypes();Now you can use the [Required] attribute in your input models and it'll work with value types.
public record PersonInputModel
{
[Required(ErrorMessage = "Provide an ID.")] public int Id { get; init; }
public int? Age { get; init; }
public string Name { get; init; } = null!;
}
public record PersonAtLocationInputModel
{
[Required] public decimal Latitude { get; init; }
[Required] public decimal Longitude { get; init; }
[Required] public PersonInputModel Person { get; init; } = null!;
}
public class AppController : ControllerBase
{
[Route("app")]
public IActionResult App([FromBody] PersonAtLocationInputModel inputModel)
{
if (!ModelState.IsValid) {
return BadRequest(ModelState);
}
return Ok(inputModel);
}
}MIT. See LICENSE.md.
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