crm/app/model/CommunityBusiness.php

<?php

namespace app\model;

use think\Model;

class CommunityBusiness extends Model
{
    public function getRecordDateAttr($value){
        if ($value) {
            return date('Y-m-d', $value);
        }
        return '';
    }

    public function setRecordDateAttr($value){
        if ($value){
            return strtotime($value);
        }
        return 0;
    }
    public function communityName(){
        return $this->hasOne(Community::class, 'id', 'community_id')->bind(['community_name'=> 'name']);
    }
}