eloquent attempt to read property on int

Question

I want to ask for your help.

I'm studying laravel, i am using laravel 10, and I need to retrieve related data, the application and data that I'm working on are related to students in a school. I want to retrieve student data with their angkatan. here's the context I'm thinking about.

all students each have 1 angkatan, whether it's the same as other students or different.

here is the code that i wrote on the model and controller in my learning project.

Model

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Siswa extends Model
{
    use HasFactory;

    protected $table = 'siswa';
    protected $primaryKey = 'id';

    // semua siswa memiliki 1 angkatan
    public function angkatan()
    {
        return $this->belongsTo(Angkatan::class, 'angkatan', 'id');
    }
}

Controller

namespace App\Http\Controllers;

use App\Models\Siswa;
use Illuminate\Http\Request;

class SiswaController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        // siswa with angkatan where angkatan = angkatan.id
        $siswa = Siswa::with('angkatan')->first();
        $test = "ini adalah test";
      
        return view('siswa', compact('siswa', 'test'));
    }
}

when I did dump() I found that the batch was obtained successfully, here is the result of the dump that I got

{
    "id": 1,
    "user_id": 15,
    "nis": "4994247",
    "nama": "Radika Mandala",
    "kelas": "XI TKJ",
    "angkatan": {
        "id": 2,
        "tahun": "2023",
        "nama": "2023 Gelombang 2",
        "tgl_mulai": "2023-05-05",
        "tgl_selesai": "2023-07-05",
        "created_at": "2023-06-04T11:20:43.000000Z",
        "updated_at": "2023-06-04T11:20:43.000000Z",
        "deleted_at": null
    },
    "no_hp": "+96168988859",
    "alamat": "Ki. Industri No. 881",
    "laporan": null,
    "created_at": "2023-06-04T11:20:44.000000Z",
    "updated_at": "2023-06-04T11:20:44.000000Z",
    "deleted_at": null
}

however when trying to access it directly in the view linked with the following code {{ dump($siswa->angkatan->tahun) }} I get an error Attempt to read property "tahun" on int

I didn't find the problem where, because from the results returned from the controller data angkatan should have been successfully obtained, unfortunately in this case I only used the database that was already created, without making migrations or other things in Laravel that I was working on,

Answer 1

You can't have a field (attribute) and a relationship with the same name since you are trying to access your data via dynamic properties, $model->property. It can only resolve that to either the actual field (attribute) or the relationship.

The column on the table should be ankatan_id and the relationship would be as it currently is ankatan. Now there is no ambiguity, ankatan_id is the field and ankatan is the relationship.

$model->ankatan_id // field (attribute)
$model->ankatan    // relationship dynamic property

If you can't change your schema you could change the name of the relationship.