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MediatR.Extensions.FluentValidation.AspNetCore 6.0.0

MediatR.Extensions.FluentValidation.AspNetCore

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MediatR extension to the FluentValidation for .NET framework

Install

First you need to install packages Mediatr and FluentValidation, then follow the instructions below

Install with nuget

Install-Package MediatR.Extensions.FluentValidation.AspNetCore

Install with .NET CLI

dotnet add package MediatR.Extensions.FluentValidation.AspNetCore

How to use

Setup - Add configuration in startup

public void ConfigureServices(IServiceCollection services)
{
 // Add framework services etc.
 services.AddMvc();
 
 var domainAssembly = typeof(GenerateInvoiceHandler).GetTypeInfo().Assembly;
 // Add MediatR
 services.AddMediatR(cfg => cfg.RegisterServicesFromAssembly(domainAssembly));

 //Add FluentValidation
 services.AddFluentValidation(new[] {domainAssembly});
 
 //Add other stuffs
 ...
}

Use

Implement validator for your IRequest objects. Validation will be executed before handling IRequestHandler.

public class GenerateInvoiceValidator : AbstractValidator<GenerateInvoiceRequest>
{
 public GenerateInvoiceValidator()
 {
 RuleFor(x => x.Month).LowerThan(13);
 // etc.
 }
}

public class GenerateInvoiceRequest : IRequest
{
 public int Month { get; set; }
}
public class GenerateInvoiceRequestHandler : IRequestHandler<GenerateInvoiceRequest>
{
 public async Task Handle(GenerateInvoiceRequest request, CancellationToken cancellationToken)
 {
 // request data has been validated
 ...
 }
}

More examples check FluentValidation docs: https://fluentvalidation.net/start