Master/Entities/SubDistrict.php

<?php

    namespace Modules\Master\Entities;

    class SubDistrict extends BaseModel
    {
        protected $fillable = [
            'district_id',
            'code',
            'name',
            'postal_code',
            'status',
            'created_by',
            'updated_by',
            'deleted_by',
        ];

        public function district()
        {
            return $this->belongsTo(District::class);
        }
    }