sam-api/app/Models/Qualitys/Lot.php

<?php

namespace App\Models\Qualitys;

use App\Models\Materials\Material;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Lot extends Model
{
    use SoftDeletes;

    // 자재 마스터
    public function material()
    {
        return $this->belongsTo(Material::class, 'material_id');
    }

    // 판매 기록
    public function sales()
    {
        return $this->hasMany(LotSale::class, 'lot_id');
    }
}