Recover value of field in ng-repeat - angularjs

Question

Sorry for the english, i'm french student :(
I would like create a comment system with AngularJS for a project.
I would like recover a value of an object who is in ng-repeat loop.
JSON : https://drive.google.com/file/d/0Bzj557dnogzOd0ZUMnZ1cWZLSFU/edit?usp=sharing
HTML :
<section ng-controller='AnnouncesCtrl' ng-show='!showActions' ng-swipe-left='showActions=true'>
<header class='header'>
<span class="return"><a href='#newAnnounce'>8</span>
</header>
<div class='loader' ng-show='loader'></div>
<section class='panel'>
<div ng-repeat='a in dept.announce' class='announces'>
<span class='title'>{{a.name}}</span>
<br/>
<span class="date">{{a.date}}</span>
<hr>
<span class="msg">{{a.desc}}</span>
<hr>
<div class="showrep" ng-click="show=true" ng-show='!show'>Montrer les réponses</div>
<div class="allrep" ng-show="show" ng-repeat='answer in a.answers'>{{answer}}<br/></div>
<div class="formrep">
<form ng-submit='addComments()'>
<input type='text' placeholder='Écrire une réponse'><input type='submit' ng-click='a.btn={{a.id}}' value='Répondre'>
</form>
</div>
</div>
</section>
JS :
function AnnouncesCtrl($scope,$http,$rootScope,$location){
$scope.getInfos=function(){
var dept="http://agence-pandor.fr/getAnnounces/index.php";
$scope.loader=true;
$http.get(dept)
.success(deptSuccess)
.error(function(){
$scope.loader=false;
alert('Impossible de récupérer le numéro étudiant. Veuillez vous reconnecter');
$location.url("/connexion"); // On redirige
})
}
deptSuccess=function(response){
$scope.loader=false;
$scope.dept=response;
}
$scope.getInfos();
$scope.addComments=function(){
alert($scope.dept.announce.btn);
}
}
Screenshot :
https://drive.google.com/file/d/0Bzj557dnogzOUDlfNWR3eEthQzA/edit?usp=sharing

Answer 1

I don't quite understand what your project is about (I don't know French). You are iterating over the array "announce" which is supposedly a property of "dept". When you type:
ng-repeat = 'a in dept.announce'
you are creating a temporary variable "a" in the scope that is meant for ng-repeat (like counter variable in a for loop).
If "btn" is supposed to be a unique value, then use:
ng-click = "btn = a.id"
or if "btn" is specific to each value of "a in announce", use:
ng-click = "btn[$index] = a.id";
You can get the value of btn in your JS file by using $scope.btn