public function addInfluenceField()
 {
     $background_id = Input::get("background");
     if ($background_id) {
         $cap = new InfluenceCap();
         $cap->background_id = $background_id;
         $cap->capacity = 1;
         $cap->delta = '';
         $cap->save();
         return Redirect::to('/dashboard/storyteller/influence/caps');
     } else {
         return Response::json(['success' => false, 'message' => 'Invalid data.']);
     }
 }