yii-2-bootstrap-update-dialog

• To use this widget you should put the folder bootstrapupdatedialog in your directory with widgets. In my case it's common/widgets . If your widget directory differs - you should change namespaces in php files according to your widget directory path.
• In your view you should call render widget like that:

\common\widgets\bootstrapupdatedialog\BootstrapUpdateDialog::widget([
  'view'=>$this,
  'updateOptions'=>[
    'updateLinks'=>'.translate',
    'updateTitle'=>'Translate',
    'gridSelector'=>'#projects'
  ]
]);

Again, correct namespace if needed. This is basic configuration. Widget parameters: * updateOptions - array of the options with next elements: 1. createLinks - selector for links to open create modal, 2. updateLinks - selector for links to open update modal, 3. gridSelector - selector of the grid, that should be updated, 4. dialogContent - selector of the container where content for dialog will be loaded, 5. updateDialogWithCallback - function that should replace default function(prepare params for ajax request and sends it), 6. updateDialogActionBase - function that should replace default function(called when click on element with createLinks selector and updateLinks selector), 7. getFormData - function that should replace default function(used to get data from form), 8. createTitle - title for create modal, 9. updateTitle - title for update modal, 10. validate - js validation function if needed(should return true if everything is ok and false otherwise) 11. ajaxOptions - * type - type of request(default 'post'), * dataType - data type(default 'json'), * cache - default false 12. hideDelay - time in milliseconds before autoclose of the dialog when form is successfully saved (default 500) * idDialog - you could specify id of the dialog (in case if there is going to be more than one dialog in one page)

Your controller action will look like this:

public function actionCreate() {
  $model = new ProjectImage();
  if ($model->load(Yii::$app->request->post()) && $model->save()) {
    echo Json::encode([
      'status'=>'success',
      'content'=>\Yii::t('site','SUCCESS_CREATED'),
    ]);
  } else {
    echo Json::encode([
      'status'=>'failure',
      'content'=>$this->renderPartial('_form', ['model' => $model,]),
    ]);
  }
  \Yii::$app->end(200);
}