MediatR.Extensions.FluentValidation.Core

MediatR extension for FluentValidation using asp.net core

Install with nuget

Install-Package MediatR.Extensions.FluentValidation.Core

Install with .NET CLI

dotnet add package MediatR.Extensions.FluentValidation.Core

How to use

Setup - Add configuration in startup

public void ConfigureServices(IServiceCollection services)
{
    // Add framework services etc.
    services.AddMvc();
    
    // Add MediatR
    services.AddMediatR(typeof(Startup));

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

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseHttpsRedirection();

    //Add FluentValidation Middleware
    app.UseFluentValidationExceptionHandler();

   //Add other stuffs
    ...
}

Sample Validation

public class CreateTodoCommandValidator : AbstractValidator<CreateTodoCommand>
{
    public CreateTodoCommandValidator()
    {
        RuleFor(x => x.Task)
            .NotEmpty();
    }
}

public class CreateTodoCommand : IRequest<Todo>
{
    public CreateTodoCommand(string task, bool isCompleted)
    {
        Task = task;
        IsCompleted = isCompleted;
    }

    public string Task { get; }
    public bool IsCompleted { get;}
}