Cachet/app/Models/ComponentGroup.php

<?php

/*
 * This file is part of Cachet.
 *
 * (c) Alt Three Services Limited
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CachetHQ\Cachet\Models;

use Illuminate\Database\Eloquent\Model;
use Watson\Validating\ValidatingTrait;

class ComponentGroup extends Model
{
    use ValidatingTrait;

    /**
     * The validation rules.
     *
     * @var string[]
     */
    protected $rules = [
        'name' => 'required|unique:component_groups',
    ];

    /**
     * The fillable properties.
     *
     * @var string[]
     */
    protected $fillable = ['name', 'order'];

    /**
     * A group can have many components.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function components()
    {
        return $this->hasMany(Component::class, 'group_id', 'id');
    }
}