public static async IAsyncEnumerable <ValidationResult> ValidateAsync(this AliasPart part, IStringLocalizer S, ISession session)
{
if (!string.IsNullOrWhiteSpace(part.Alias))
{
if (part.Alias.Length > AliasPart.MaxAliasLength)
{
yield return(new ValidationResult(S["Your alias is too long. The alias can only be up to {0} characters.", AliasPart.MaxAliasLength], new string[] { nameof(part.Alias) }));
}
if (!await IsAliasUniqueAsync(part, session, part.Alias))
{
yield return(new ValidationResult(S["Your alias is already in use."], new[] { nameof(part.Alias) }));
}
}
}
public static async Task <bool> IsAliasUniqueAsync(this AliasPart context, ISession session, string alias)
{
return((await session.QueryIndex <AliasPartIndex>(o => o.Alias == alias && o.ContentItemId != context.ContentItem.ContentItemId).CountAsync()) == 0);
}