function solr()
{
$document = new \xml\document();
$fields = $document->element('fields');
$this->traverse(function ($path, $property) use($document, $fields) {
$types = ['boolean' => 'boolean', 'datetime' => 'date', 'enum' => 'string', 'integer' => 'int', 'number' => 'float', 'string' => 'string'];
$required = (isset($property->required) and $property->required) ? 'true' : 'false';
$stored = 'true';
$multiValued = 'false';
if (isset($types[$property->type])) {
$field = $document->element('field');
$field['@name'] = $path;
$field['@type'] = $types[$property->type];
$field['@required'] = $required;
$field['@indexed'] = in_array($property->type, ['string']) ? (isset($property->indexed) and $property->indexed) ? 'true' : 'false' : 'true';
$field['@stored'] = $stored;
$field['@multiValued'] = $multiValued;
$fields->append($field);
}
});
$document->append($fields);
return $document->render();
}