我开始从事一个小项目，我有两个模型Building＆Apartment，每个Building可以有许多公寓。
所以我在模型之间创建了一个关系，但是当我尝试访问父级（建筑物）时出现错误
这是我的模特：
// Building.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\Apartment;
class Building extends Model
{
protected $guarded = [];
public function apartment(){
return $this->hasMany(Apartment::class);
}
}
// Apartment.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\Building;
class Apartment extends Model
{
protected $guarded = [];
public function building(){
return $this->belongsTo(Building::class);
}
}
我的控制器：
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Apartment;
use App\Building;
public function index()
{
$apartment = Apartment::with('building')->get();
return $apartment->building;
}
错误信息 ： Property [building] does not exist on this collection instance.
我想得到这样的结果：
Building 1
Apartment A
Apartment b
Building 2
Apartment A
b公寓
问题在于，get方法获取公寓集合只能获取一个公寓，然后从中获取建筑物。
public function index()
{
$apartment = Apartment::with('building')->first();
return $apartment->building;
}
该get方法返回一个Illuminate\Support\Collection包含结果的，其中每个结果都是PHPstdClass对象的实例。您可以通过将列作为对象的属性来访问来访问每个列的值：
$apartaments = Apartment::with('building')->get();
foreach ($apartments as $apartament) {
echo $apartament->building;
}
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我来说两句