UNIT3D/app/Models/Participant.php

<?php

/**
 * NOTICE OF LICENSE.
 *
 * UNIT3D Community Edition is open-sourced software licensed under the GNU Affero General Public License v3.0
 * The details is bundled with this project in the file LICENSE.txt.
 *
 * @project    UNIT3D Community Edition
 *
 * @author     Roardom <roardom@protonmail.com>
 * @license    https://www.gnu.org/licenses/agpl-3.0.en.html/ GNU Affero General Public License v3.0
 */

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Participant extends Model
{
    use SoftDeletes;

    /**
     * The attributes that aren't mass assignable.
     *
     * @var string[]
     */
    protected $guarded = [];

    /**
     * Belongs to a user.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo<User, $this>
     */
    public function user(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * Belongs to a user.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo<Conversation, $this>
     */
    public function conversation(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(Conversation::class);
    }

    /**
     * Has many messages in the conversation.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany<PrivateMessage, $this>
     */
    public function messages(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(PrivateMessage::class, 'conversation_id', 'conversation_id');
    }
}