如何在Laravel中减少SQL查询

Question

我正在开发一个项目，在那里我使用了预先加载，我希望减少SQL查询

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ScreenShot2

public function showAllOrdersbySite($domain_id){
    $orders = Order::whereHas('paymentStatus', function ($query) use($domain_id) {
        $query->where("domain_id","=",$domain_id);

    })->orderby('tbl_orders.created_at', 'desc')->paginate(20);
        return View('admin.all_orders')
            ->with('orders',$orders);
}

Answer 1

http://forumsarchive.laravel.io/viewtopic.php?id=5104

https://laracasts.com/forum/?p=95-best-practice-to-minimize-db-queries/0

laravel eager loading to minimize queries

此链接可能会有所帮助......

Answer 2

我不知道要添加功能，我只是通过添加这样的方法来解决我的问题 来源：Eager Load Constraints Filter issue in Laravel

public function showAllOrdersbySite($domain_id){
    $orders = Order::with('func1',func2)->whereHas('paymentStatus', function ($query) use($domain_id) {
        $query->where("domain_id","=",$domain_id);

    })->orderby('tbl_orders.created_at', 'desc')->paginate(20);
        return View('admin.all_orders')
            ->with('orders',$orders);
}

Answer 3

使用Laravel Eager加载或Laravel LAzy Eager Loading。 Laravel LAzy渴望加载满足您的要求