private function loadBooks()
{
$categoryId = 1;
// load testing books
for ($i = 0; $i < 50; $i++) {
$book = Books::fetchNew();
$bookId = $book->set('name', 'book' . $i)->set('release_date', '2016-06-24')->save();
$booksCategories = BooksCategories::fetchNew();
$booksCategories->set('book_id', $bookId)->set('category_id', $categoryId++);
$booksCategories->save();
if ($categoryId == 4) {
$categoryId = 1;
}
}
}
