SharpGrip.FluentValidation.AutoValidation.Mvc 1.1.0

SharpGrip FluentValidation AutoValidation

Builds

Introduction

SharpGrip FluentValidation AutoValidation is an extension of the FluentValidation (v10+) library enabling automatic asynchronous validation in MVC controllers and minimal APIs (endpoints). The library FluentValidation.AspNetCore is no longer being maintained and is unsupported. As a result, support for automatic validation provided by this library is no longer available. This library re-introduces this functionality for MVC controllers and introduces automation validation for minimal APIs (endpoints). It enables developers to easily implement automatic validation in their projects.

Installation

Register your validators with the Microsoft DI service container, for instructions on setting that up please see https://docs.fluentvalidation.net/en/latest/di.html.

MVC controllers

For MVC controllers reference NuGet package SharpGrip.FluentValidation.AutoValidation.Mvc (https://www.nuget.org/packages/SharpGrip.FluentValidation.AutoValidation.Mvc).

using SharpGrip.FluentValidation.AutoValidation.Mvc.Extensions;

builder.Services.AddFluentValidationAutoValidation();

Minimal APIs (endpoints)

For minimal APIs (endpoints) reference NuGet package SharpGrip.FluentValidation.AutoValidation.Endpoints (https://www.nuget.org/packages/SharpGrip.FluentValidation.AutoValidation.Endpoints).

Enabling minimal API (endpoint) automatic validation can be done on both route groups and routes.

using SharpGrip.FluentValidation.AutoValidation.Endpoints.Extensions;

builder.Services.AddFluentValidationAutoValidation();

var app = builder.Build();
var endpointGroup = app.MapGroup("/some-group").AddFluentValidationAutoValidation();
endpointGroup.MapPost("/", (SomeModel someModel) => $"Hello {someModel.Name}");

app.MapPost("/", (SomeOtherModel someOtherModel) => $"Hello again {someOtherModel.Name}").AddFluentValidationAutoValidation();

Configuration

MVC controllers

using SharpGrip.FluentValidation.AutoValidation.Mvc.Extensions;

builder.Services.AddFluentValidationAutoValidation(configuration =>
{
    // Disable the built-in .NET model (data annotations) validation.
    configuration.DisableBuiltInModelValidation = true;

    // Only validate controllers decorated with the `FluentValidationAutoValidation` attribute.
    configuration.ValidationStrategy = ValidationStrategy.Annotation;

    // Replace the default result factory with a custom implementation.
    configuration.OverrideDefaultResultFactoryWith<CustomResultFactory>();
});

public class CustomResultFactory : IFluentValidationAutoValidationResultFactory
{
    public IActionResult CreateActionResult(ActionExecutingContext context, ValidationProblemDetails? validationProblemDetails)
    {
        return new BadRequestObjectResult(new {Title = "Validation errors", ValidationErrors = validationProblemDetails?.Errors});
    }
}

Minimal APIs (endpoints)

using SharpGrip.FluentValidation.AutoValidation.Endpoints.Extensions;

builder.Services.AddFluentValidationAutoValidation(configuration =>
{
    // Replace the default result factory with a custom implementation.
    configuration.OverrideDefaultResultFactoryWith<CustomResultFactory>();
});

public class CustomResultFactory : IFluentValidationAutoValidationResultFactory
{
    public IResult CreateResult(EndpointFilterInvocationContext context, ValidationResult validationResult)
    {
        var validationProblemErrors = validationResult.ToValidationProblemErrors();
        return Results.ValidationProblem(validationProblemErrors, "Some details text.", "Some instance text.", (int) HttpStatusCode.BadRequest, "Some title.");
    }
}