public function actionAddkpi($goal_id)
 {
     $model = new KPI();
     $model->Goal_ID = $goal_id;
     if ($model->load(Yii::$app->request->post()) && $model->validate()) {
         $model->User_ID = Yii::$app->user->identity->ID;
         if ($model->save()) {
             Yii::$app->session->setFlash('kpiCreated', 'KPI has been saved');
         } else {
             Yii::$app->session->setFlash('kpiCreated', 'There was a problem saving this KPI');
         }
         return $this->render('addkpi', ['model' => $model, 'added' => true]);
     }
     return $this->render('addkpi', ['model' => $model, 'added' => false]);
 }