How to access the FluentValidation ErrorCodes?

Question

I’m trying to access the FluentValidation ErrorCodes with the following code, which is hosted in my Controller.

My ModelState.IsValid is returning false, as I have errors, which is correct. The validation works ok on the View i.e. validation errors are being displayed.

But my validator doesn’t return any errors even when I have errors!

public class ApplicationValidator : AbstractValidator<ApplicationViewModel>
	{
		public ApplicationValidator()
		{
			RuleSet("EligibilityValidator", () =>
			{

				RuleFor(x => x.EligibilityRuleOne)
					.NotNull()
					.WithErrorCode("1")
					.WithMessage("Error message 1");

				RuleFor(x => x.EligibilityRuleTwo)
					.NotNull()
					.WithErrorCode("2")
					.WithMessage("Error message 2");

				RuleFor(x => x.EligibilityRuleThree)
					.NotNull()
					.WithErrorCode("3")
					.WithMessage("Error message 3");
			});
		}
	}

[HttpPost]
		[ValidateAntiForgeryToken]
		public IActionResult EligibilityChecks([CustomizeValidator(RuleSet = "EligibilityValidator")] ApplicationViewModel model, string SaveContinuebtn)
		{
			if (ModelState.IsValid)
			{
				if (!string.IsNullOrEmpty(SaveContinuebtn))
				{
					return RedirectToAction("Register");
				}
			}

		    var validator = new ApplicationValidator();
			var validationResult = validator.Validate(model);
			var errors = validationResult.Errors
				.OrderBy(e => e.ErrorCode)
				.ToList();
			foreach (var error in errors)
			{
				ModelState.AddModelError(error.PropertyName, error.ErrorMessage);
			}

			return View(GetViewPath1("Index", model));
		}

Answer 1

Hi @Joe

            var validator = new ApplicationValidator();
			var validationResult = validator.Validate(model);

The issue relates the Validate() method. Since you are setting the rule sets when define the validation rules, so when using the Validate() method, you need to set the RuleSets. If not set the RuleSets, the validation result is true.

Try to modify your code as below:

		    var validator = new ApplicationValidator();
			var validationResult = validator.Validate(model, options => options.IncludeRuleSets("EligibilityValidator"));

You can check this screenshot:

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Best regards,

Dillion