test/app/Http/Models/WeekTaskHistory.php

<?php

namespace App\Http\Models;

use Illuminate\Database\Eloquent\Model;

class WeekTaskHistory extends Model
{
    protected $primaryKey = 'id';
    protected $table = 'week_task_history';
    protected $guarded = [];

    public function designer()
    {
        return $this->hasOne(User::class,'id','design_id');
    }

    public function dutyMan()
    {
        return $this->hasOne(User::class,'id','duty_id');
    }
    public function webMan(){
        return $this->hasOne(User::class,'id','web_id');
    }
}