How to organize nested multi-forms in Yii2?

Question

Yii

Good afternoon. There was a need to implement nested, but at the same time multi-forms in the main form. I.e:

class MasterForm extends Model
{
    ....
   /**
     * @var PortfolioForm[]
     */
    public $portfolios = [];
    ....
}

class PortfolioForm extends Model
{
    ...
    public $categoryId;
    ...
}

In the view file:

// $model - MasterForm

/** @var PortfolioForm $portfolioForm **/
foreach ($model->portfolios as $portfolioForm) {
    echo $form->field($portfolioForm, 'categoryId')->dropDownList([...]);
}

In this case, it does not occur to me how it is possible to make sure that all portfolio forms come in the post-data array, since there will be an "Add another +" button that will copy another form.

Answer 1

Use composite forms
https://github.com/ElisDN/yii2-composite-form