About loading datas to views

Hi. I use $ionicview.enter event for loading data. So, datas are loading each view call. I get latest datas on server like this. I show this datas in a list. When I click an item on list, it goes detail page. But when I go back, view enter fires again and datas are loading again. I don’t want this. How can I prevent data loading when I go back ? Can someone give me any idea about this ?
Thanks in advance.