渴望加载时收到错误

Question

我很想加载这样的画廊

$user = User::where('username', $username)->first();
        $favorites = Favorite::with('gallery')->where('user_id', $user->id)->get();
        dd($favorites->gallery);

并收到此错误消息：

Undefined property: Illuminate\Database\Eloquent\Collection::$gallery

我最喜欢的课程如下：

class Favorite extends Model
{
    protected $table = 'favorites';
    public function user(){
        return $this->belongsTo(User::class, 'user_id');
    }
    public function gallery(){
        return $this->belongsTo(Gallery::class, 'gallery_id');
    }
}

但是，如果我这样做

$user = User::where('username', $username)->first();
        $favorites = Favorite::with('gallery')->where('user_id', $user->id)->get();
        dd($favorites);

然后我得到了这个

Answer 1

first()是一个集合，你无法获得集合的属性。

您需要使用$favorites = Favorite::with('gallery')->where('user_id', $user->id)->first(); 从集合中获取第一个对象：

foreach ($favorites as $favorite) {
    echo $favorite->gallery;
}

或者迭代收集并获取所有对象：

ListCtrlRevMsg = new wxListCtrl(this, ID_LISTCTRL1, wxPoint(72,8),wxSize(330,100), wxLC_REPORT, wxDefaultValidator, _T("ID_LISTCTRL1"));