function has_one_tag(moojon_model_collection $models = null, moojon_base_model $model, moojon_base_column $column, moojon_base_relationship $relationship, $attributes = array())
{
$return = null;
$name = $column->get_name();
$attributes = try_set_name_and_id_attributes($attributes, $model, $column);
if ($value = moojon_request::get_or_null($name)) {
$attributes['value'] = $value;
$return = div_tag(array(hidden_input_tag($attributes), redirection_tag(moojon_server::redirection())));
} else {
$foreign_key = $relationship->get_foreign_key();
$key = $relationship->get_key();
$relationship_name = $relationship->get_class($model);
$relationship = new $relationship_name();
$models = $models ? $models : $relationship->read();
$options = array();
if ($column->get_null()) {
$options['Please select...'] = 0;
}
foreach ($models as $option) {
$options[(string) $option] = $option->{$key};
}
$selected = $model->{$name} ? $model->{$name} : moojon_uri::get_or_null($foreign_key);
$return = select_options($options, $selected, $attributes);
}
return $return;
}
