appadmin-demosss/app/Models/UserZ.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class UserZ extends Model
{
    protected $connection = 'mysql_z';
    protected $table='user';
    protected $fillable = ['openid','unionid','phone','name','nickname','wechat','avatar','integral','level_name','up_phone','last_time',
        'status','bonus','up_name','rank','rank_end','integral_send','total','money','war_names','province','city','area','township',
    'challenge_num','accept_num'];

    public function user(){
        return $this->hasOne(User::class,'mobile','phone');
    }
}