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PHP Version : 8.1.29

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Dir : ~/var/www/html/Compro-ISP/app/Models/

Edit File: District.php

<?php

namespace App\Models;

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

class District extends Model
{
    use HasFactory;
     protected $table = 't_reg_district';
    protected $primaryKey = 'id';
    public $timestamps = false;

protected $fillable = ['c_district', 'ref_reg_province'];

// District *..1 Province
    public function province()
    {
        return $this->belongsTo(Province::class, 'ref_reg_province', 'id');
    }

// District 1..* SubDistrict
    public function subDistricts()
    {
        return $this->hasMany(SubDistrict::class, 'ref_reg_district', 'id');
    }

// District 1..* Village (via SubDistrict)
    public function villages()
    {
        return $this->hasManyThrough(
            Village::class,      // target
            SubDistrict::class,  // via
            'ref_reg_district',     // FK di sub_district yang menunjuk ke district.id
            'ref_reg_district',     // FK di village yang menunjuk ke sub_district.id
            'id',                   // PK district
            'id'                    // PK sub_district
        );
    }
}