Select2 multiple return saved values

[TomaIvanovTomov]

Trying to return saved values in the field on update scenario but nothing show. What I am doing is

public static function getAllSelectedCategoriesSelect2()
    {
        $categories = (new Query())
            ->select(['page.id', 'pageLang.title'])
            ->from('page')
            ->leftJoin('pageLang', 'page.id=pageLang.page_id')
            ->rightJoin('attribute_category', 'page.id=attribute_category.category_id')
            ->where('pageLang.language=:lang',[':lang' => Yii::$app->language])
            ->all();

        return ArrayHelper::map($categories, 'id', 'title');
    }

and passing the result to the value property of the widget like so

Select2::widget([
                            'name' => 'categories',
                            'value' => Attribute::getAllSelectedCategoriesSelect2(),
                            'data' => Attribute::getAllCategoriesSelect2(),
                            'options' => [
                                'multiple' => true,
                                'placeholder' => Yii::t('app', 'Select categories'),
                                'allowClear' => true
                            ],
                            'pluginOptions' => [
                                'tags' => true,
                            ]
                        ])

The result from this is empty field. What am I missing ? Thank you in advance!

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