ANTOOZA-BACKEND/SharedKernel/Attributes/MustBeTrueAttribute.cs

using System.ComponentModel.DataAnnotations;

namespace SharedKernel.Attributes;

public class MustBeTrueAttribute : ValidationAttribute
{
    protected override ValidationResult? IsValid(object? value, ValidationContext validationContext)
    {
        if (value is bool boolValue && boolValue)
        {
            return ValidationResult.Success;
        }

        return new ValidationResult(ErrorMessage ?? "값은 `true` 여야 합니다.");
    }
}