Load JSON to display data, using ng-repeat {ANGULAR.JS}

All we need is an easy explanation of the problem, so here it is.

My Html:

<div class="graph-display" ng-controller="jsonServerBox">
    <div class="bar-chart-box" ng-repeat="module in ocw.modules"> 
        <canvas class="chart chart-bar" data="{{module.data}}" labels="{{module.labels}}" series="{{module.series}}"></canvas>
    </div>
</div>

My JS:

app.controller('jsonServerBox', function($scope, $http) {
  var json = $http.get('serverbox.json').then(function(res){
          return res.data;
        });
  $scope.ocw = json;    
    });

The Chart doesn’t gets displayed, don’t know why? I’m not getting any error in console either.

UPDATE: MY JSON FILES CONTENT

[{"modules":[
            {
               "series":"SeriesA",
               "data":["90", "99", "80", "91", "76", "75", "60", "67", "59", "55"],
               "labels":["01", "02", "03", "04", "05", "06", "07","08","09","10"]
            },

            {
               "series":"SeriesB",
               "data":["90", "99", "80", "91", "76", "75", "60", "67", "59", "55"],
               "labels":["01", "02", "03", "04", "05", "06", "07","08","09","10"]
            }

    ]}
]

CONSOLE LOG:

modules: Array[2]0: Objectdata: Array[10]0: "90"1: "99"2: "80"3: "91"4: "76"5: "75"6: "60"7: "67"8: "59"9: "55"length: 10__proto__: Array[0]labels: Array[10]0: "01"1: "02"2: "03"3: "04"4: "05"5: "06"6: "07"7: "08"8: "09"9: "10"length: 10__proto__: Array[0]series: "SeriesA"__proto__: Object1: Objectdata: Array[10]0: "90"1: "99"2: "80"3: "91"4: "76"5: "75"6: "60"7: "67"8: "59"9: "55"length: 10__proto__: Array[0]labels: Array[10]0: "01"1: "02"2: "03"3: "04"4: "05"5: "06"6: "07"7: "08"8: "09"9: "10"length: 10__proto__: Array[0]series: "SeriesB"

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

The problem with your code is that json is Promise object not the data returned from AJAX call. Also your question has “returning from AJAX request” aspect. Make sure you understand related problem, check this very popular question.

Proper way to set scope data retrieved with AJAX request in Angular is to do it inside then callback:

app.controller('jsonServerBox', function ($scope, $http) {
    $http.get('serverbox.json').then(function (res) {
        $scope.ocw = res.data;
    });
});

Method 2

In you case json variable is nothing but it contains promise object.

And Promise should always be resolve using .then

CODE

var json = $http.get('serverbox.json').then(function(res) {
    return res.data;
});
json.then(
  //success callback
  function(data) {
      $scope.ocw = data
  },
  //error callback
  function() {
      //error handling
  })
});

This would help you.

Thanks.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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