common\models\PostComment::rules PHP Method

    public function rules()
    {
        return [[['parent', 'post_id', 'status', 'user_id', 'like_count', 'created_at', 'updated_at'], 'integer'], [['post_id', 'comment', 'user_id', 'ip'], 'required'], [['comment'], 'string', 'min' => 1], [['ip'], 'string', 'max' => 255]];
    }