/**
 * Get bundle preview for a relationship bundle
 * @param BundlableLabelableBaseModelWithAttributes $t_rel_instance
 * @param array $pa_initial_values
 * @param string $ps_template
 * @param string $ps_delimiter
 * @return string
 */
function caGetBundlePreviewForRelationshipBundle($t_rel_instance, $pa_initial_values, $ps_template, $ps_delimiter = '; ')
{
    if (!is_array($pa_initial_values) || sizeof($pa_initial_values) == 0) {
        return '""';
    }
    // it's very unlikely that the preview will fit more then 10 items
    if (sizeof($pa_initial_values) > 10) {
        $pa_initial_values = array_slice($pa_initial_values, 0, 10);
    }
    if (!$t_rel_instance instanceof BundlableLabelableBaseModelWithAttributes) {
        return '""';
    }
    $va_ids = $va_previews = array();
    foreach ($pa_initial_values as $va_item) {
        $va_ids[] = $va_item['id'];
    }
    $o_res = $t_rel_instance->makeSearchResult($t_rel_instance->tableName(), $va_ids);
    while ($o_res->nextHit()) {
        $va_previews[] = $o_res->getWithTemplate($ps_template);
    }
    return caEscapeForBundlePreview(join($ps_delimiter, $va_previews));
}