<?php

namespace App\Models;

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

class ProductionOrderItem extends Model
{
    use HasFactory;

    protected $fillable = [
        'production_order_id',
        'inventory_id',
        'quantity_used',
        'unit_id',
    ];

    protected $casts = [
        'quantity_used' => 'decimal:4',
    ];

    /**
     * 所屬生產工單
     */
    public function productionOrder(): BelongsTo
    {
        return $this->belongsTo(ProductionOrder::class);
    }

    /**
     * 使用的庫存紀錄
     */
    public function inventory(): BelongsTo
    {
        return $this->belongsTo(Inventory::class);
    }

    /**
     * 單位
     */
    public function unit(): BelongsTo
    {
        return $this->belongsTo(Unit::class);
    }
}
