drb/app/Model/BoxDetail.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

/**
 *
 * Class Unit
 * @package App\Models
 */
class BoxDetail extends Model
{
    protected $table = "box_detail"; //指定表
    const CREATED_AT = 'crt_time';
    const UPDATED_AT = 'upd_time';
    protected $dateFormat = 'U';
    protected $guarded = [];

    public $month = [
        1 => '01_03',
        2 => '01_03',
        3 => '01_03',
        4 => '04_06',
        5 => '04_06',
        6 => '04_06',
        7 => '07_09',
        8 => '07_09',
        9 => '07_09',
        10 => '10_12',
        11 => '10_12',
        12 => '10_12',
    ];

    public function __construct(array $attributes = [])
    {
        parent::__construct($attributes);
        if (isset($attributes['channel']) && $attributes['channel'] > 0) {
            $channel = $attributes['channel'];
            $month = (int)substr($channel,4,2);
            $channel = substr($channel,0,4).$this->month[$month];
            $this->setTableById($channel);
        }
    }


    /**
     * @param $channel
     */
    // 动态指定数据表
    public function setTableById($channel)
    {
        if ($channel > 0) {
            $tb = $this->table.'_' . (string)$channel;
            $this->createTable($tb);
            $this->setTable($tb);
        }

    }

    public function createTable($channel){
//        $table_name = 'box_detail_' . (string)$channel;
        if(!Schema::hasTable($channel)){
            DB::update('create table '.$channel.' like box_detail');
        }
    }
}