[Question] How to where other field of collection

[letuananh1873]

I have a collection is manga (_id, title, slug) and chapter

At Chapter Model

$collection = self::raw(function ($collection) use ($manga_slug, $chapter_slug) {
            return $collection->aggregate([
                [
                    '$lookup' => [
                        'as' => 'story',
                        'from' => 'manga',
                        'foreignField' => 'id',
                        'localField' => 'manga',
                    ]
                ],
                [
                    '$match' => [
                        'name' => $chapter_slug
                    ]
                ],

            ]);
});

Result show OK, but I want to where field slug of manga collection. How to do it?

Thank you so much!