lianjie_admin/app/Models/FinancialRecord.php

<?php

namespace App\Models;

use App\Models\BaseModel;
use Illuminate\Database\Eloquent\Model;
use DB;

// class FinancialRecord0 extends BaseModel
// {
//     protected $table = 'lanzu_financial_record_0';
// }

// class FinancialRecord1 extends BaseModel
// {
//     protected $table = 'lanzu_financial_record_1';
// }

// class FinancialRecord2 extends BaseModel
// {
//     protected $table = 'lanzu_financial_record_2';
// }

// class FinancialRecord3 extends BaseModel
// {
//     protected $table = 'lanzu_financial_record_3';
// }

// class FinancialRecord4 extends BaseModel
// {
//     protected $table = 'lanzu_financial_record_4';
// }

class FinancialRecord extends Model
{

    public function __construct($table = null)
    {

        $index = $user_id % 5;
        $table_name = 'lanzu_financial_record_0';
        switch ($index) {
            case  0:
            case  1:
            case  2:
            case  3:
            case  4:
                $table_name = 'lanzu_financial_record_' . $index;
                $model_name = 'App\\Models\\'.'FinancialRecord1';
                //$buider =  DB::table($table_name);
                $model = new BaseModel;
                $model->setTable($table_name);
                $buider = $model;
                //$buider = $buider::where('id',1);
                // $buider = $buider::where('id',1);
            default:
                # code...
                break;
        }

        //if(empty($table)) $table = 'lanzu_financial_record_0';
        $this->setTable($table_name);
        parent::__construct([]);
    }

    public static function getFinancialRecordModel($user_id){
        $buider = null;
        $index = $user_id % 5;

        switch ($index) {
            case  0:
            case  1:
            case  2:
            case  3:
            case  4:
                dump($index);
                $model_name = 'App\\Models\\'.'FinancialRecord'.$index;
                $buider = $model_name;
            default:
                # code...
                break;
        }
        return $buider;
    }
}