bike-admin/app/Http/Resources/CardRidingUserBagsResource.php

<?php

namespace App\Http\Resources;

use Carbon\Carbon;
use Illuminate\Http\Resources\Json\JsonResource;

class CardRidingUserBagsResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        $model = $this->resource;
        $surplus_days = (Carbon::now()->diffInDays(Carbon::make($model->expiration_time))) > 0 ? (Carbon::now()->diffInDays(Carbon::make($model->expiration_time))) : 0;
        $data = [
            'user_truename' => $model->users->truename ?? '',
            'user_mobile' => $model->users->mobile ?? '',
            'area_name' => $model->areas->name ?? '',
            'cardRidingOrder' => $model->cardRidingOrder,
            'surplus_days' => $surplus_days
        ];
        return array_merge(parent::toArray($request),$data);
    }
}