<?php

namespace App\Models;

use App\Models\Traits\ReadAll;
use Overtrue\LaravelFollow\Traits\CanBeFavorited;

class Policy extends Model
{
    use CanBeFavorited, ReadAll;

    protected $dates = [
        'begined_at',
        'ended_at',
    ];

    /**
     * 所属部门
     * @return [type] [description]
     */
    public function category()
    {
        return $this->belongsTo(Category::class)->withDefault();
    }

    /**
     * 所属行业
     * @return [type] [description]
     */
    public function trades()
    {
        return $this->belongsToMany(Trade::class, 'policy_trades')->withTimestamps();
    }

    /**
     * 所属地区
     * @return [type] [description]
     */
    public function areas()
    {
        return $this->belongsToMany(ChinaArea::class, 'policy_areas')->withTimestamps();
    }

    public function getTitle()
    {
        return $this->title;
    }

    public function getTradeTitleAttribute()
    {
        $trades = $this->trades()->get();
        $title  = [];
        foreach ($trades as $key => $trade) {
            $title[] = $trade->title;
        }

        return implode(" ", $title);

    }

}