此集合实例上不存在属性[column]

Question

使用get()方法时

        $user = User::find(1)->get(); 
        
        $user->getAddress->city;

此集合实例上不存在属性[getAddress]。

使用first()方法后

        $user = User::find(1)->first(); 
        
        $user->getAddress->city;

此集合实例上不存在属性[city]。

app\models\user.php

namespace App\Models;

use App\Models\Address;

class User extends Model
{

    public function getAddress(){

        return $this->hasMany(
                                Address::class, 
                                'user_id', 
                                'id'
                            );
    }

}

app\models\address.php

namespace App\Models;


class Address extends Model
{

    protected $fillable = ['city', 'state', 'user_id'];
    
}

Answer 1

find方法如下所示

public function find($id, $columns = ['*'])
{
    if (is_array($id) || $id instanceof Arrayable) {
        return $this->findMany($id, $columns);
    }

    return $this->whereKey($id)->first($columns);
}

该方法首先返回，因此需要执行$user=user::find(1)；，这将返回用户。