hainan/app/Models/OrderProductItem.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;

class OrderProductItem extends BaseModel
{
    use HasFactory;

    protected $guarded = ['id']; //不允许批量赋值的字段

	public function __construct(array $attributes = [])
	{
		parent::__construct($attributes);
		//$this->timestamps = false;
	}

	public function order()
	{
		return $this->belongsTo(Order::class,'order_id','id');
	}

	public function product()
	{
		return $this->belongsTo(Product::class,'product_id','id');
	}

	public function supplier()
	{
		return $this->belongsTo(Supplier::class);
	}

	public function agent()
	{
		return $this->belongsTo(Agent::class);
	}
}