course-site/app/Repositories/Models/School/Lesson.php

<?php

namespace App\Repositories\Models\School;

use Illuminate\Database\Eloquent\Model;
use Prettus\Repository\Contracts\Transformable;
use Prettus\Repository\Traits\TransformableTrait;

/**
 * Class Lesson.
 *
 * @package namespace App\Repositories\Models\School;
 */
class Lesson extends Model implements Transformable
{
    use TransformableTrait;

    protected $table = 'school_lessons';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $guarded = [];

    public function category()
    {
        return $this->belongsTo(\App\Repositories\Models\Base\Category::class)->select(['id', 'name']);
    }

    public function teacher()
    {
        return $this->belongsTo(Teacher::class)->select(['id', 'name', 'account']);
    }
}