Validation error message

ServiceStack Validation
1

Hello,

I am using [ValidateNotEmpty] attribute in my DTOs and want to customize the error message by specifying a user-friendly property name and a fixed message format.

For example:

[ValidateMyNotEmpty(PropName = “Šifra”)]
public string Sifra { get; set; }

The validation error should be:

‘Šifra’ je obavezan podatak

Is there an easy way to achieve this?

Thanks!

2

It’s not possible with Declarative Validation Attributes, you would need to use Fluent Validation for customization.

3

Ok, is it possible to use the default declarative validators and only change the default error message without modifying {PropertyName}?

I tried the following approach, but it doesn’t work:

using ServiceStack.Validation;

[assembly: HostingStartup(typeof(ConfigureValidation))]

namespace Synapse.Server;

public class ConfigureValidation : IHostingStartup
{
    public void Configure(IWebHostBuilder builder) => builder
        .ConfigureAppHost(appHost =>
        {
            var validation = appHost.Plugins.Find(x => x is ValidationFeature) as ValidationFeature;
            validation?.ErrorCodeMessages.Add("NotEmpty", "{PropertyName} je obavezan podatak");
        });
}
4

The way you customize Fluent Validation error messages is with a Custom Language Manager.

5

Hello,

I noticed that the Serbian translations in ServiceStack’s validation messages contain some typos.

FluentValidation provides a correct Serbian localization, which can be found here:
:link: FluentValidation Serbian Translation on GitHub

Would it be possible to update the SerbianLanguage class in ServiceStack using this version?

Thanks!

6

I’ve updated all Fluent Validation Languages in the latest v8.6.1 that’s now available in pre release packages.

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