public function actionDay($id)
 {
     $exercise = new Exercise();
     #Добавление упражнения к текущему дню
     if ($exercise->load(Yii::$app->request->post()) && $exercise->validate()) {
         $exercise->p_id = $id;
         //айди для опознания к какому дню упражнение
         $exercise->save();
         return $this->render('day', ['day' => $id, 'exercise' => $exercise, 'model' => Forms::find()->where(['id' => $id])->one(), 'exercises' => Exercise::find()->where(['p_id' => $id])->all()]);
     }
     return $this->render('day', ['day' => $id, 'exercise' => $exercise, 'model' => Forms::find()->where(['id' => $id])->one(), 'exercises' => Exercise::find()->where(['p_id' => $id])->all()]);
 }
 public function actionData($id)
 {
     return $this->render('data', ['id' => $id, 'exercises' => Exercise::find()->where(['id' => $id])->one()->delete()]);
 }