That library include Comment model and CommentBehaviour. It is simple and fast way to provide easy adding comments for others models.

The preferred way to install this extension is through composer.

Either run

composer require dmuratov/yii2-universal-comment:~1.0

or add

"dmuratov/yii2-universal-comment" : "~1.0"

to the require section of your application's composer.json file.

Adding behaviour for model:

public function behaviors()
{
    return [
        ...
        'comment' => [
            'class' => \dmuratov\comment\CommentBehaviour::className()
        ]
    ];
}

Adding comment for model

$model->addComment('Comment text');

Getting comments

$model->getComments()->all();