Question

I’m using fluent validation in MVC 3. Is it possible to turn off fluent validation for specific post action in controller?

Thanks

Answer 1

Assuming you are using the AttributedValidatorFactory and you wanted to disable validation for the Index action on Home controller for POST verbs you could write a custom validator factory:

public class MyAttributedValidatorFactory : AttributedValidatorFactory
{
    private readonly Func<HttpContextBase> _contextAccessor;
    public MyAttributedValidatorFactory(Func<HttpContextBase> contextAccessor)
    {
        _contextAccessor = contextAccessor;
    }

    public override IValidator GetValidator(Type type)
    {
        var context = _contextAccessor();
        var rd = context.Request.RequestContext.RouteData;
        var action = rd.GetRequiredString("action");
        var controller = rd.GetRequiredString("controller");

        if (string.Equals("post", context.Request.HttpMethod, StringComparison.OrdinalIgnoreCase) &&
            string.Equals("index", action, StringComparison.OrdinalIgnoreCase) && 
            string.Equals("home", controller, StringComparison.OrdinalIgnoreCase)
        )
        if (type == typeof(MyViewModel))
        {
            return null;
        }

        return base.GetValidator(type);
    }
}

which will be used to replace the default one in your Application_Start:

FluentValidationModelValidatorProvider.Configure(config =>
{
    Func<HttpContextBase> contextAccessor = 
        () => new HttpContextWrapper(HttpContext.Current);
    config.ValidatorFactory = new MyAttributedValidatorFactory(contextAccessor);
});

and then if you have the following action on the Home controller:

[HttpPost]
public ActionResult Index(MyViewModel model)
{
    ...
}

FluentValidation won’t kick in.