skeeks\cms\controllers\ModelPropertiesController::actionValidate PHP Method

    public function actionValidate()
    {
        if (\Yii::$app->request->isAjax && !\Yii::$app->request->isPjax) {
            if (\Yii::$app->request->post('sx-model') && \Yii::$app->request->post('sx-model-value')) {
                $modelClass = \Yii::$app->request->post('sx-model');
                $modelValue = \Yii::$app->request->post('sx-model-value');
                /**
                 * @var $modelForm Form
                 */
                $modelForm = $modelClass::find()->where(['id' => $modelValue])->one();
                if (method_exists($modelForm, "createPropertiesValidateModel")) {
                    $model = $modelForm->createPropertiesValidateModel();
                } else {
                    $model = $modelForm->getRelatedPropertiesModel();
                }
                $model->load(\Yii::$app->request->post());
                \Yii::$app->response->format = Response::FORMAT_JSON;
                return ActiveForm::validate($model);
            }
        }
    }