public CreateRequirementTypeCommandValidator(IRequirementTypeValidator requirementTypeValidator)
{
CascadeMode = CascadeMode.Stop;
RuleFor(command => command)
.MustAsync((command, token) => NotExistsARequirementTypeWithSameCode(command.Code, token))
.WithMessage("Requirement type with this code already exists!")
.MustAsync((command, token) => NotExistsARequirementTypeWithSameTitle(command.Title, token))
.WithMessage("Requirement type with this title already exists!");
async Task <bool> NotExistsARequirementTypeWithSameCode(string code, CancellationToken token)
=> !await requirementTypeValidator.ExistsWithSameCodeAsync(code, token);
async Task <bool> NotExistsARequirementTypeWithSameTitle(string title, CancellationToken token)
=> !await requirementTypeValidator.ExistsWithSameTitleAsync(title, token);
}
