带有 Eloquent ORM 的 Slim 3 - 集合中不存在关系

Question

I have a problem with Eloquent relationships in my Slim 3 based application. The goal is return $data to view. When I try that:

use App\Models\Favorite as F;
$favs = F::where('user_id',$_SESSION['user_id'])->get()->offer;

foreach($favs as $offer)
{
    //  not important now...
}

return $data;       

I am getting an error: Property [offer] does not exist on this collection instance. I made relations in my Offer and Favorite models:

public function offer() // in Favorite model
{
    return $this->belongsTo('App\Models\Offer', 'offer_url');
}

public function favorite() // in Offer model
{
    return $this->hasMany('App\Models\Favorite', 'url');
}

In database we can see tables: offers (with url column) and favorites (with offer_url column).

How to make that relationships working?

Please for help.

Answer 1

Get method return a Collection instance, not Favorite.

Use:

$favs = F::where('user_id', $_SESSION['user_id'])->get();

then:

foreach($favs as $favorite) {
   $offer = $favorite->offer;
}

And don't forget to use eager loader: https://laravel.com/docs/5.4/eloquent-relationships#lazy-eager-loading