Which is the best way to update comments data when new record is added to database? i recently have this code which is working fine , but I am thinking that this way of coding may take long time if i have large amount of comments.Any help is appreciated
function addComment(comment){
dataservice.addComment(comment).then(function(response){
if(response.status == 200){
vm.getArticleComments(); // this will make new request to backend to fetch all comments
comment.body = '';
}else{
return false;
}
});
}
I was thinking to push new comment to view if response code is 200
IMO, Better use arrays instead.
Use unshift()
method to prepend the ng-repeat
list.
var data = [bar,bar2,bar3];
data.unshift(newItem);
//data = [newItem,bar,bar2,bar3];
Before doing this, make sure that you've successfully populated the database using $http
.
As you said that you're think to push, that is also a good option but that will push the new data to the end of the list in the view.
Hope this helps you :)
var app = angular.module('app', []);
app.controller('MainCtrl', ['$scope', function ($scope) {
$scope.items = [{
name: '1',
type: 'A'
}, {
name: '2',
type: 'B'
}];
$scope.prependItem = function () {
$scope.items.unshift({
name: '3',
type: 'C'
});
};
}]);
<!DOCTYPE html>
<html ng-app="app">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" />
<script>document.write('<base href="' + document.location + '" />');</script>
<script src="//code.angularjs.org/1.2.6/angular.min.js"></script>
<script src="//code.angularjs.org/1.2.6/angular-route.min.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<div ng-repeat="item in items" watch-scope="item">
<div class="someClass">Item name: {{item.name}}</div>
<div class="anotherClass">Item type: {{item.type}}</div>
</div>
<button ng-click="prependItem()">Add New</button>
</body>
</html>