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

<?php

namespace App\Http\Resources;

use Illuminate\Http\Resources\Json\JsonResource;

class AnnouncementResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        $model = $this->resource;
        $area_name = $model->areas->name ?? '';
        if($model->area_id == 0){
            $area_name = '全部';
        }
        $data = [
            'area_name' => $area_name,
        ];
        return array_merge(parent::toArray($request),$data);
    }
}