jucai/app/Models/Jobfair/JobfairBlacklist.php

<?php

namespace App\Models\Jobfair;

use App\Models\Company;
use Illuminate\Database\Eloquent\Model;

class JobfairBlacklist extends Model
{
    protected $table = 'jobfair_blacklists';
    protected $guarded = [];

    public function companys()
    {
        return $this->belongsTo(Company::class, 'company_id');
    }
}