content-delivery-api-10.cs

private void PopulateGotoPageOnSubmit(Form form, FormDto dto)
{
    if (form.GoToPageOnSubmit == 0)
    {
        return;
    }

    Attempt<Guid> gotToPageKeyAttempt = _entityService.GetKey(form.GoToPageOnSubmit, UmbracoObjectTypes.Document);
    if (gotToPageKeyAttempt.Success == false)
    {
        return;
    }

    Guid gotoPageContentId = gotToPageKeyAttempt.Result;
    dto.GotoPageOnSubmit = gotoPageContentId;

    IPublishedContent? gotoPageContent = GetContent(gotoPageContentId);
    if (gotoPageContent == null)
    {
        return;
    }

    dto.GotoPageOnSubmitRoute = _apiContentRouteBuilder.Build(gotoPageContent);
}

private IPublishedContent? GetContent(Guid id)
{
    IPublishedSnapshot publishedSnapshot = _publishedSnapshotAccessor.GetRequiredPublishedSnapshot();
    IPublishedContent? content = publishedSnapshot.Content?.GetById(id);
    return content != null && content.ContentType.ItemType == PublishedItemType.Content ? content : null;
}