I successfully implemented FluentValidation in my WebApi project controller that only had one HttpGet method. When I added another HttpGet method, I added route attribute to both methods. i.e. [Route("Method1")] and [Route("Method2")].
Now the ModelState comes back as true regardless of whether I enter any data or not.
Here is my code.
WebApiConfig
public static class WebApiConfig { public static void Register(HttpConfiguration config) { config.Filters.Add(new ValidateModelStateFilter()); //FluentValidation FluentValidationModelValidatorProvider.Configure(config); // Web API routes config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "{action}/{id}", defaults: new { controller = "Menu", id = RouteParameter.Optional} ); } } ValidateModelStateFilter
public class ValidateModelStateFilter : ActionFilterAttribute { public override void OnActionExecuting(HttpActionContext actionContext) { if (!actionContext.ModelState.IsValid) { actionContext.Response = actionContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState); } } } Controller
[HttpGet] [Route("Method1")] public IHttpActionResult ReadAllMenusByApplication([FromUri] ReadAllMenusByApplicationInput input) { var result = new List<ApplicationMenu>(); ... } Input Object
using FluentValidation; using FluentValidation.Attributes; namespace MenuService.Models { [Validator(typeof(ReadAllMenusByApplicationInputValidator))] public class ReadAllMenusByApplicationInput { public ReadAllMenusByApplicationInput() { this.ApplicationName = string.Empty; } /// <summary> /// The MenuSystem name of the application /// </summary> public string ApplicationName { get; set; } } public class ReadAllMenusByApplicationInputValidator : AbstractValidator<ReadAllMenusByApplicationInput> { public ReadAllMenusByApplicationInputValidator() { RuleFor(x => x.ApplicationName).NotEmpty(); } } }
1 Answers
Answers 1
Using this article for reference
Custom Validation in ASP.NET Web API with FluentValidation
You seem to have most of what is done in the referenced article.
Check your configuration order.
public static class WebApiConfig { public static void Register(HttpConfiguration config) { // Web API configuration and services config.Filters.Add(new ValidateModelStateFilter()); // Web API routes config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "{action}/{id}", defaults: new { controller = "Menu", id = RouteParameter.Optional} ); //FluentValidation FluentValidationModelValidatorProvider.Configure(config); } } FluentValidation automatically inserts its errors into the ModelState. You should include an error message.
public class ReadAllMenusByApplicationInputValidator : AbstractValidator<ReadAllMenusByApplicationInput> { public ReadAllMenusByApplicationInputValidator() { RuleFor(x => x.ApplicationName).NotEmpty() .WithMessage("The Application Name cannot be blank."); } } The article has some content that is outside of the scope of your question. mainly wrapping the responses but everything else should work for you.
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