TypeError: Cannot read property 'push' of undefined, JavaScript

Question

I\'m working in this Angular project where user submits a comment form, and the new comment is added to the comments that\'s already posted. Here is my code.

Answer 1

You may try this

.controller('productCtrl', function($scope, $http, $routeParams, Page){
  $scope.product = {};
  $scope.review = {};
  $scope.comments = [];

  routeparm = $routeParams.param;

  $scope.review = function(){
  var review_box = $scope.review_form.review_box;

$http.post('./comment.php', {
    comment : review_box,
    code: routeparm
}).success(function(data){
        $scope.comments.push(data.comments);
        $scope.review.review_box = '';
}).error(function(data){
    $scope.has_error = true;
    $scope.error_message = data;
})

};