lanzu_api_2021-12-26/app/Model/v3/OrderMain.php

<?php

namespace App\Model\v3;

use App\Model\Model;

class OrderMain extends Model
{
    protected $table = 'lanzu_order_main';

    protected $appends = [
        'created_at_text'
    ];

    public function getCreatedAtTextAttribute()
    {
        return date('Y-m-d H:i:s', $this->attributes['created_at']);
    }

    public function market()
    {
        return $this->belongsTo(Market::class, 'market_id', 'id');
    }

    public function orderGoods()
    {
        // firstKey是中间表联当前表的列，secondKey是远程表对应中间表的列，localKey是当前表关联中间表的列，secondLocalKey是中间表关联远程表的列
        return $this->hasManyThrough(
            OrderGoods::class,
            Order::class,
            'order_main_id',
            'order_id',
            'id',
            'id'
        );
    }
}