Why is the request not working in RedBean?

Question

PHP

There is a questionnaire table

On the page I derive data from it using RedBean.

$answers = R::find('questionnaire', 'date = ?', array($date));

Instead of person_id, using a many-to-one relationship, I display the last name and first name from the person table

foreach ($answers as $answer) {
            $l_name = $answer->person['last_name'];
            $f_name = $answer->person['first_name'];
......
}

Instead of theme_id, I'm trying to display the name field from the themes table. However, if in the first case everything goes fine, then the theme name does not display. Connections: I can not understand what the problem is and what needs to be done?
$themes = $answer->themes['name'];

Answer 1

It's all about the name. The themes table, so the link should be named themes_id, this is stated in the documentation. Be careful and check all connections.