Laravel雄辩地说“有”和“哪里”有多个表格

I've 3 tables on my project:

1. Mall
2. Shop
3. Product

I've a page to search for products in the whole database. I need an option where they can search the product by the mall name. So I built my code like this:

$query = Product::with('shop', 'shop.mall');

if (!empty($data["keyword"])) {
    $query = $query->where(function($q) use($data) {
         $q->where('shop.mall.name', 'LIKE', '%' . $data["keyword"] . '%')->orWhere('shop.mall.keyword', 'LIKE', '%' . $data["keyword"] . '%');
    });
}

But it is showing this error:

Column not found: 1054 Unknown column 'shop.mall.name' in 'where clause'

Is there any problem with my query? Thank you

To search within relation use whereHas(), it creates subquery and returns data filtered in shop.mall.

    $query = Product::with('shop', 'shop.mall');

    if (!empty($data["keyword"])) {
        $query = $query->whereHas('shop.mall',function($q) uses ($data){
            $q->where('name', 'LIKE', '%' . $data["keyword"] . '%')->
              orWhere('keyword', 'LIKE', '%' . $data["keyword"] . '%');
        });
    }