How to foreach a hasMany relationship in Laravel 6 - laravel

Question

I'm using Laravel 6 and I want to foreach a hasMany relationship between Layanan Model and Objek Model
Layanan Model
class Layanan extends Model
{
protected $fillable = ['nama_layanan'];
protected $primaryKey = 'layanans_id';
public function objeks()
{
return $this->hasMany(Objek::class);
}
}
Objek Model
class Objek extends Model
{
protected $fillable = ['layanan_id', 'tipe_objeks'];
protected $primaryKey = 'objeks_id';
public function layanan()
{
return $this->belongsTo(Layanan::class);
}
}
Controller.php
class ObjekController extends Controller
{
public function object()
{
$objek = \App\Objek::all();
return view('pages.alat.object.object')->with('data', $objek);
}
}
View
#foreach ($data as $item)
#foreach ($item->layanan as $layanan)
<tr>
<td>{!! $item->objeks_id !!}</td>
<td>{!! $layanan->layanan_id !!},</td>
<td>{!! $item->tipe_objeks !!}</td>
<td>{!! $item->created_at->format('d/m/Y') !!}</td>
<td>{!! $item->updated_at->format('d/m/Y') !!}</td>
</tr>
#endforeach
#endforeach
I get the error
Invalid argument supplied for foreach()
What did I do wrong? Sometimes, it says that 'layanan' is non-object.

Answer 1

class Objek extends Model
{
protected $fillable=[
'layanan_id', 'tipe_objeks'
];
protected $primaryKey = 'objeks_id';
public function layanan() {
return $this->hasMany(Layanan::class,'layanan_id','layanan_id');
}
}
if you put Objek hasMany layanan
then only u can loop over 1 row of Objek
like $data = Objek::find(1(=);
foreach($data as $layanan)

Answer 2

Just update your view as below to add if condition to check wheather relationship values exist for each record.
#foreach ($data as $item)
#if($item->layanan->count())
#foreach ($item->layanan as $layanan)
<tr>
<td>{!! $item->objeks_id !!}</td>
<td>{!! $layanan->layanan_id !!},</td>
<td>{!! $item->tipe_objeks !!}</td>
<td>{!! $item->created_at->format('d/m/Y') !!}</td>
<td>{!! $item->updated_at->format('d/m/Y') !!}</td>
</tr>
#endforeach
#endif
#endforeach

Answer 3

My problem was exactly what you got. I can't loop collection from hasMany relationship.
I'd solved by converting data into object instead of collection.
public function convertToObject($data) {
return json_decode(json_encode($data), FALSE);
}
public function object() {
$objek = \App\Objek::all();
$objek = $this->convertToObject($objek);
return view('pages.alat.object.object')->with('data', $objek);
}

Answer 4

when you define relationship it will take id as PK so good practice define FK and PK like below
class Layanan extends Model
{
protected $fillable=[
'nama_layanan'
];
protected $primaryKey = 'layanans_id';
public function objeks() {
return $this->hasMany('App\Objek', 'layanan_id', 'layanans_id');
}
}
then you need to use IF()
#foreach ($data as $item)
#if(isset($item->layanan)) //// #if($item->layanan && is_array($item->layanan)) or #if(count($item->layanan) > 0)
#foreach ($item->layanan as $layanan)
#endforeach
#endif
#endforeach
UPDATE
as per your relationship if you take data from Objek then use like this
#foreach ($data as $item)
<tr>
<td>{!! $item->objeks_id !!}</td>
<td>{!! $item->layanan->layanans_id !!},</td>
<td>{!! $item->tipe_objeks !!}</td>
<td>{!! $item->created_at->format('d/m/Y') !!}</td>
<td>{!! $item->updated_at->format('d/m/Y') !!}</td>
</tr>
#endforeach