What is the best way to extract specific data from a JSON file based on a chosen property using AngularJS and the $http.get method?

Question

What is the best way to extract specific data from a JSON file based on a chosen property using AngularJS and the $http.get method?

I am working with a JSON file that contains color information like this:

{
  "colorsArray":[{
    "colorName":"red",
    "hexValue":"#f00"
  },
  {
    "colorName":"green",
    "hexValue":"#0f0"
  },
  {
    "colorName":"blue",
    "hexValue":"#00f"
  },
  {
    "colorName":"cyan",
    "hexValue":"#0ff"
  },
  {
    "colorName":"magenta",
    "hexValue":"#f0f"
  },
  {
    "colorName":"yellow",
    "hexValue":"#ff0"
  },
  {
    "colorName":"black",
    "hexValue":"#000"
  }
]}

In my JavaScript file, I have the code snippet below where I use $http.get to fetch the JSON data:

var app = angular.module('app', ['ngTagsInput']);
app.controller('MainCtrl', function($scope, $http) {

  $scope.loadTags = function(query) {
      return $http.get('tags.json');
  };
});

I want to extract only the colorName values from the JSON file when using AngularJS and making an external call with $http.get. How can I achieve this?

javascript angularjs json

Answer 1

Answer №1

When a request is made to the json file, it is not possible to query the file directly. The most efficient way to retrieve specific data is by sending an HTTP call with query parameters to a backend service method, which will then execute and return the desired result from the server side.

Alternatively, another approach is to filter the data on the client side. In this scenario, all JSON data is initially returned as the response, and then the relevant information needs to be filtered out within the controller.

$scope.loadTags = function(query) {
    return $http.get('tags.jon').then(function(response) {
        var data = response.data.map(function(obj) {
            return obj.colorName;
        })
        return data;
    })
};

Answer 2

When a request is made to the json file, it is not possible to query the file directly. The most efficient way to retrieve specific data is by sending an HTTP call with query parameters to a backend service method, which will then execute and return the desired result from the server side.

Alternatively, another approach is to filter the data on the client side. In this scenario, all JSON data is initially returned as the response, and then the relevant information needs to be filtered out within the controller.

$scope.loadTags = function(query) {
    return $http.get('tags.jon').then(function(response) {
        var data = response.data.map(function(obj) {
            return obj.colorName;
        })
        return data;
    })
};

What is the best way to extract specific data from a JSON file based on a chosen property using AngularJS and the $http.get method?

Answer №1

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