app-api/app/Models/IntegralW.php

<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class IntegralW extends Model{
    use SoftDeletes;

    protected $connection = 'mysql_w';
    protected $table='integral';
    protected $guarded=[];

    public function getIntegralAttribute($value){
        return round($value);
    }
    public function getIntegralDoubleAttribute($value){
        return round($value);
    }

}