Bondarukini.Validator 10.0.0

Bondarukini.Validator

A lightweight, dependency-free validation library for .NET, inspired by FluentValidation.
Provides a simple, fluent API for defining and running validation rules.

✨ Features

• Fluent, chainable syntax

  RuleFor(x => x.Name)
      .NotEmpty()
      .MinimumLength(3)
      .WithMessage("Name must be at least 3 characters long.");
  

• Built-in rule set

  • NotEmpty()
  • MinimumLength(int)
  • GreaterThan(IComparable)
  • GreaterThanOrEqualTo(IComparable)
  • LessThan(IComparable)
  • LessThanOrEqualTo(IComparable)

• Supports both synchronous and asynchronous validation

• Works perfectly with Bondarukini.Mediator pipeline behaviors

• Provides a ValidationContext for additional runtime data

🚀 Installation

dotnet add package Bondarukini.Validator

💡 Example Usage

using Bondarukini.Validator;
using Bondarukini.Validator.Results;

public class CreateProductCommand
{
    public string Name { get; set; } = "";
    public decimal Price { get; set; }
}

public class CreateProductCommandValidator : ValidatorBase<CreateProductCommand>
{
    public CreateProductCommandValidator()
    {
        RuleFor(x => x.Name)
            .NotEmpty()
            .MinimumLength(3)
            .WithMessage("Product name must be at least 3 characters long.");

        RuleFor(x => x.Price)
            .GreaterThan(0)
            .WithMessage("Price must be greater than zero.");
    }

    // Example of custom async validation
    public override async Task<ValidationResult> ValidateAsync(CreateProductCommand instance, CancellationToken ct = default)
    {
        var result = base.Validate(instance);
        await Task.Delay(10); // simulate async logic

        if (instance.Name == "Forbidden")
            result.Errors.Add(new ValidationFailure(nameof(instance.Name), "This product name is not allowed."));

        return result;
    }
}

🧱 Integration

To automatically execute validators inside your request pipeline, use
ValidatorBehaviour<TRequest, TResponse> from Bondarukini.Mediator.Behaviors:

services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidatorBehaviour<,>));

📦 Related Packages

🧑‍💻 Author

Yurii Bondaruk
Clean, extensible, and minimalistic architecture tools for .NET 🇺🇦