Load JSON Data into Angular-nvD3 Graph (AngularJS)

Question

I want to load encoded JSON Data retrieved with queries from a database into an Angular-nvD3 graph but I don't know how to do it or which way is the best to accomplish such task.

I retrieve encoded JSON data with queries from a database (table PRODUCTS) with an api. I have already successfully loaded such data into tables with $http requests (loaded into a factory) to the given api. The data is saved as an object into a dictionary in a factory with $http requests to the api (located in services).

Sample of the table (table PRODUCTS):

ID STOCK

1 100

2 275

Sample of the factory:

.factory('services', ['$http', function($http){
  var serviceBase = 'services/'
  var object = {};
  object.getData = function(){
    return $http.get(serviceBase + 'data');
  };
  return object;
}]);

Sample of a controller to display the data into a table (with "ng-repeat="data in get_data"" in the view):

.controller('TablesCtrl', ['$scope', 'services', function($scope, services) {

  services.getData().then(function(data){
    $scope.get_data = data.data;
  });

}]);

Sample of the data format:

[{"0":"1","1":"100","ID":"1","STOCK":"100"},{"0":"2","1":"275","ID":"2","STOCK":"275"}]

PIE CHART - This is an example of the type of script I want to addapt (from THIS repository):

'use strict';

angular.module('mainApp.controllers')

.controller('pieChartCtrl', function($scope){

    $scope.options = {
        chart: {
            type: 'pieChart',
            height: 500,
            x: function(d){return d.key;},
            y: function(d){return d.y;},
            showLabels: true,
            duration: 500,
            labelThreshold: 0.01,
            labelSunbeamLayout: true,
            legend: {
                margin: {
                    top: 5,
                    right: 35,
                    bottom: 5,
                    left: 0
                }
            }
        }
    };

    $scope.data = [
        {
            key: "One",
            y: 5
        },
        {
            key: "Two",
            y: 2
        },
        {
            key: "Three",
            y: 9
        },
        {
            key: "Four",
            y: 7
        },
        {
            key: "Five",
            y: 4
        },
        {
            key: "Six",
            y: 3
        },
        {
            key: "Seven",
            y: .5
        }
    ];
});

HTML:

<div ng-app="myApp">
    <div ng-controller="pieChartCtrl">
        <nvd3 options="options" data="data"></nvd3>
    </div>
</div>

My question is: how it is possible to load such retrieved encoded JSON data into an Angular-nvD3 graph instead of typing manually the data into $scope.data?

Thank you very much!

Answer 1

All you have to do is map your data once you receive it. I updated the plunker from my comment to show you how you might do this using lodash.

services.getData().then(function successCb(data) {
  $scope.data = _.map(data.data, function(prod) {
    return {
      key: prod.ID,
      y: prod.STOCK
    };
  });
});

Alternatively, if you don't want to use lodash (though it's usually included in angular applications by default), you could do something like:

$scope.data = [];
services.getData().then(function successCb(data) {
  angular.forEach(data.data, function(prod) {
    $scope.data.push({
      key: prod.ID,
      y: prod.STOCK
    });
  });
});

Answer 2

I think you want d3.json()

https://github.com/mbostock/d3/wiki/Requests

This command should load any JSON file. Since you're using NVD3, you should already have D3 in your project.