public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
var errors = new List <ValidationResult>();
var existingTags = HttpRequestStorage.DatabaseEntities.Tags.ToList();
if (!TagModelExtensions.IsTagNameUnique(existingTags, TagName, TagID))
{
errors.Add(new SitkaValidationResult <EditViewModel, string>(FirmaValidationMessages.TagNameUnique, x => x.TagName));
}
return(errors);
}
