What is the best way to display Json data using ng-repeat in AngularJS?

Question

What is the best way to display Json data using ng-repeat in AngularJS?

Is it possible to display JSON data in AngularJS using ng-repeat? I am trying to print only a specific part of the JSON data "data": [{"y":"23","x": "12"}], but nothing appears on the HTML page.

Try out the Demo here: http://plnkr.co/edit/zy1C2z39dXuuHDx8eqxK?p=preview

Here is the JSON Data:

{"series": [{"meter": "instance", "data": [{"y": 1.0, "x": "2015-07-21T14:21:33"}, {"y": 1.0, "x": "2015-07-22T14:21:34"}, {"y": 1.0, "x": "2015-07-23T14:21:34"}, {"y": 1.0, "x": "2015-07-24T14:23:39"}, {"y": 1.0, "x": "2015-07-25T14:23:39"}, {"y": 1.0, "x": "2015-07-26T02:43:39"}, {"y": 1.0, "x": "2015-07-27T14:24:33"}], "name": "demo", "unit": "instance"}], "settings": {}}

Using AngularJS

 app.controller('ceilometerCtrl', function($scope, $http) {
 $http.get("http://192.168.206.133:8080/admin/metering")
      .success(function(response) {                    
         $scope.metrics=response.series[0].data;              
       });
 });

HTML Structure

<div ng-controller="ceilometerCtrl">
    <div ng-repeat="metric in metrics">
        Metric: {{metric.x}}
    </div>
</div>

The Result: nothing is displayed on the page

Metric:
Metric:
Metric:
Metric:
Metric:
Metric:
Metric:

javascript json angularjs

Answer 1

Answer №1

To improve your code, there are two key changes that need to be made.

Since series is an array, make the following adjustment:
```
$scope.metrics=response.series.data;
```

The correct update is:

$scope.metrics=response.series[0].data;

The properties x and y correspond to the metric object. Update from:
```
 Metric: {{metric.data.x}}
```

The revised format should be:

 Metric: {{metric.x}}

Answer 2

To improve your code, there are two key changes that need to be made.

Since series is an array, make the following adjustment:
```
$scope.metrics=response.series.data;
```

The correct update is:

$scope.metrics=response.series[0].data;

The properties x and y correspond to the metric object. Update from:
```
 Metric: {{metric.data.x}}
```

The revised format should be:

 Metric: {{metric.x}}

Answer 3

Answer №2

Attempt

    <div ng-repeat="metric in metrics">
      Metric A:  {{metric.a}}
      Metric B:  {{metric.b}}
   </div>

Furthermore, in the controller, make a change to this line:

$scope.metrics=response.series.data;

Update it to:

$scope.metrics=response.series[0].data;

Your Json is correct. The issue was with how you used ng-repeat. The modified code snippet should resolve your problem.

Answer 4

Attempt

    <div ng-repeat="metric in metrics">
      Metric A:  {{metric.a}}
      Metric B:  {{metric.b}}
   </div>

Furthermore, in the controller, make a change to this line:

$scope.metrics=response.series.data;

Update it to:

$scope.metrics=response.series[0].data;

Your Json is correct. The issue was with how you used ng-repeat. The modified code snippet should resolve your problem.

Answer 5

Answer №3

To display your data in a controlled manner, utilize the AngularJS filter named json:

{{ your.data | json }}

Answer 6

To display your data in a controlled manner, utilize the AngularJS filter named json:

{{ your.data | json }}

Answer 7

Answer №4

If you look at the code provided above:

$scope.metrics=response.series.data;

You will notice that your $scope.metrics will return undefined because response.series is an array, not a JSON object.

There are two possible solutions to this issue

Approach 1:

app.controller('ceilometerCtrl', function($scope, $http) {

  $http.get("http://192.168.206.133:8080/admin/metering")
    .success(function(response) {
      /**
       * The response now looks like this:
       * {"series": [{"meter": "instance", "data": [{"y": 1.0, "x": "2015-07-21T14:21:33"}, {"y": 1.0, "x": "2015-07-22T14:21:34"},...}], "name": "demo", "unit": "instance"}]
       * By using response.series, you get an array of objects
       * To access each item's data property, you need to iterate over series and then over data within each item.
       * <div ng-repeat="s in series">
       *   <div ng-repeat="d in s.data">
       *     {{ d.x }} <br />
       *     {{ d.y }}
       *   </div>
       * </div>
       */
      $scope.series = response.series;
    });
});

If you prefer copy-pasting, here is the corresponding HTML

<div ng-repeat="s in series">
  <div ng-repeat="d in s.data">
    {{ d.x }} <br />
    {{ d.y }}
  </div>
</div>

Approach 2:

Retrieve the first element from your response

app.controller('ceilometerCtrl', function($scope, $http) {
  $http.get("http://192.168.206.133:8080/admin/metering")
    .success(function(response) {
      /**
       * By selecting the first element from the response array, you get a JSON object
       * { "meter": "instance","data": [{  "y": 1.0,  "x": "2015-07-21T14:21:33"}, ...],"name": "demo","unit": "instance" }
       * Simply iterate over the data series
       * <div ng-repeat="d in matrics.data">
       *     {{ d.x }} <br />
       *     {{ d.y }}
       * </div>
       */
      $scope.matrics = response.series[0];
    });
});

For the second approach, the HTML would be:

<div ng-repeat="d in matrics.data">
  {{ d.x }} <br />
  {{ d.y }}
</div>

I hope this information helps you tackle the problem effectively.

Answer 8

If you look at the code provided above:

$scope.metrics=response.series.data;

You will notice that your $scope.metrics will return undefined because response.series is an array, not a JSON object.

There are two possible solutions to this issue

Approach 1:

app.controller('ceilometerCtrl', function($scope, $http) {

  $http.get("http://192.168.206.133:8080/admin/metering")
    .success(function(response) {
      /**
       * The response now looks like this:
       * {"series": [{"meter": "instance", "data": [{"y": 1.0, "x": "2015-07-21T14:21:33"}, {"y": 1.0, "x": "2015-07-22T14:21:34"},...}], "name": "demo", "unit": "instance"}]
       * By using response.series, you get an array of objects
       * To access each item's data property, you need to iterate over series and then over data within each item.
       * <div ng-repeat="s in series">
       *   <div ng-repeat="d in s.data">
       *     {{ d.x }} <br />
       *     {{ d.y }}
       *   </div>
       * </div>
       */
      $scope.series = response.series;
    });
});

If you prefer copy-pasting, here is the corresponding HTML

<div ng-repeat="s in series">
  <div ng-repeat="d in s.data">
    {{ d.x }} <br />
    {{ d.y }}
  </div>
</div>

Approach 2:

Retrieve the first element from your response

app.controller('ceilometerCtrl', function($scope, $http) {
  $http.get("http://192.168.206.133:8080/admin/metering")
    .success(function(response) {
      /**
       * By selecting the first element from the response array, you get a JSON object
       * { "meter": "instance","data": [{  "y": 1.0,  "x": "2015-07-21T14:21:33"}, ...],"name": "demo","unit": "instance" }
       * Simply iterate over the data series
       * <div ng-repeat="d in matrics.data">
       *     {{ d.x }} <br />
       *     {{ d.y }}
       * </div>
       */
      $scope.matrics = response.series[0];
    });
});

For the second approach, the HTML would be:

<div ng-repeat="d in matrics.data">
  {{ d.x }} <br />
  {{ d.y }}
</div>

I hope this information helps you tackle the problem effectively.

Answer 9

Answer №5

To simplify the process, you can utilize the "json" filter based on your data structure. In this case, accessing response.series[0].data; as mentioned earlier may be necessary. Once you have extracted the desired data, it becomes straightforward:

Metric: <pre>{{metrics.series[0].data|json}}</pre>

View a basic example here: http://jsfiddle.net/hLf1rLxz/

Following your request for an update, I noticed issues with your plunkr setup. The absence of the d3.time reference and errors related to RickSha were addressed by rearranging the code structure. By placing $scope.series above the initialization of new RickShaw, the displayed information was successfully corrected.

Updated plunker version: http://plnkr.co/edit/iMB4ElKqfAlM0wdyqpA7?p=preview

Necessary code adjustments:

<body ng-controller="MainCtrl">
   <pre>{{metrics | json}}</pre>

   <div id="chart"></div>
 </body>

Answer 10

To simplify the process, you can utilize the "json" filter based on your data structure. In this case, accessing response.series[0].data; as mentioned earlier may be necessary. Once you have extracted the desired data, it becomes straightforward:

Metric: <pre>{{metrics.series[0].data|json}}</pre>

View a basic example here: http://jsfiddle.net/hLf1rLxz/

Following your request for an update, I noticed issues with your plunkr setup. The absence of the d3.time reference and errors related to RickSha were addressed by rearranging the code structure. By placing $scope.series above the initialization of new RickShaw, the displayed information was successfully corrected.

Updated plunker version: http://plnkr.co/edit/iMB4ElKqfAlM0wdyqpA7?p=preview

Necessary code adjustments:

<body ng-controller="MainCtrl">
   <pre>{{metrics | json}}</pre>

   <div id="chart"></div>
 </body>

What is the best way to display Json data using ng-repeat in AngularJS?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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