A wrapper around Yii2 Bootstrap Modal for using an ActiveForm via AJAX inside.

The preferred way to install this extension is through composer.

Either run

$ php composer.phar require --prefer-dist karnbrockgmbh/yii2-modal-ajax "@dev"

or add

"karnbrockgmbh/yii2-modal-ajax": "@dev"

to the require section of your composer.json file.

Extend your basic logic with ajax render and save capabilities:

<?php
public function actionCreate()
{
    $model = new Company();

    if ($model->load(Yii::$app->request->post())) {
        if ($model->save()) {             
            return $this->redirect(['view', 'id' => $model->id]);             
        }
    }

    return $this->render('create', [
        'model' => $model,
    ]);
}

to

<?php
public function actionCreate()
{
    $model = new Company();

    if ($model->load(Yii::$app->request->post())) {
        if ($model->save()) {             
            if (Yii::$app->request->isAjax) {
                // JSON response is expected in case of successful save
                Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
                return ['success' => true];
            }
            return $this->redirect(['view', 'id' => $model->id]);             
        }
    }

    if (Yii::$app->request->isAjax) {
        return $this->renderAjax('create', [
            'model' => $model,
        ]);
    } else {
        return $this->render('create', [
            'model' => $model,
        ]);
    }
}

<?php
use karnbrockgmbh\modal\Modal;

Modal::begin([
    'id' => 'createCompany',
    'url' => Url::to(['/partner/default/create']), // Ajax view with form to load
    'ajaxSubmit' => true, // Submit the contained form as ajax, true by default
    // ... any other yii2 bootstrap modal option you need
]);
Modal::end();

On top if the basic twitter bootstrap modal events the following events are triggered

This event is triggered right before the view for the form is loaded. Additional parameters available with this event are:

• xhr: XMLHttpRequest, the jQuery XML Http Request object used for this transaction.
• settings: object, the jQuery ajax settings for this transaction.

$('#createCompany').on('kbModalBeforeShow', function(event, xhr, settings) {
    console.log('kbModalBeforeShow');
});

This event is triggered after the view for the form is successful loaded. Additional parameters available with this event are:

• data: object, the data object sent via server's response.
• status: string, the jQuery AJAX success text status.
• xhr: XMLHttpRequest, the jQuery XML Http Request object used for this transaction.

$('#createCompany').on('kbModalShow', function(event, data, status, xhr) {
    console.log('kbModalShow');
});

This event is triggered right before the form is submitted. Additional parameters available with this event are:

• xhr: XMLHttpRequest, the jQuery XML Http Request object used for this transaction.
• settings: object, the jQuery ajax settings for this transaction.

$('#createCompany').on('kbModalBeforeSubmit', function(event, xhr, settings) {
    console.log('kbModalBeforeSubmit');
});

This event is triggered after the form is successful submitted. Additional parameters available with this event are:

• data: object, the data object sent via server's response.
• status: string, the jQuery AJAX success text status.
• xhr: XMLHttpRequest, the jQuery XML Http Request object used for this transaction.

$('#createCompany').on('kbModalSubmit', function(event, data, status, xhr) {
    console.log('kbModalSubmit');
    // You may call pjax reloads here
});