Question

I have a problem with fluentvalidation (version 3.4.6.0 with fluentvalidation.MVC4, jQuery validation 1.9.0.1), the validation will fail when the value is 0 and it should not. Here is my code and a failing test.

public class SomeModel
{
    public string Id { get; set; }
    public decimal Price { get; set; }
}

public class EditMachineValidator : AbstractValidator<SomeModel>
{
    public SomeModelValidator()
    {
        RuleFor(x => x.Price).NotEmpty();
        RuleFor(x => x.Price).GreaterThanOrEqualTo(0m);
    }
}

[Fact]
public void Should_Not_Have_Error_When_Price_Is_Zero()
{
    var validator = SomeModelValidator();
    validator.ShouldNotHaveValidationErrorFor(x => x.Price, 0m);
}

Am I doing something wrong here?

Answer 1

after some tests, GreaterThanOrEqualTo is not the problem.

It’s coming from

RuleFor(x => x.Price).NotEmpty();

as a 0 value is considered as empty !
If you remove it, it will work.