How to make filling with migrations in a many-to-many relationship?

Question

Yii

There are three tables Autor, Book and BookAutor. The Autor table is populated like this

$this->insert(Autor::tableName(), [
            'first_name' => 'Рей',
            'second_name' => 'Бредбери',
        ]);

this is how the Book table is filled

$this->insert(Book::tableName(), [
            'title' => '451 градус по Фаренгейту',
        ]);

now I would like to know the id of the filled tables in order to fill the BookAutor table with the
book_id and autor_id values

Answer 1

and what prevents in migrations to create instances of Author and Book?
if it is not imported by the millions, of course.
but in general, it seems that you need imports, not migrations ...

Answer 2

$id = Yii::$app->db->schema
    ->insert(Autor::tableName(), [
        'first_name' => 'Рей',
        'second_name' => 'Бредбери',
    ]);

or

$this->insert(Autor::tableName(), [
    'first_name' => 'Рей',
    'second_name' => 'Бредбери',
]);
$id = Yii::$app->db->schema->getLastInsertID()