Sharing data between functions within an AngularJS service

Question

Sharing data between functions within an AngularJS service

I have been struggling to find a solution for this issue. I have a service where I am logging a URL and then passing it into my getData() function. However, when I try to use it, it returns undefined. I have attempted different methods including moving the initial $http.get into the controller or inside the getData() function itself. Can anyone help point me in the right direction?

di.service('testService', function($http) {
    $http.get('https://us.api.data/tichondrius?locale=en_US&apikey=xxxxxxxx').
    then(function(response) {
        var urlToJsonFileUncut = response.data.files[0].url;
        console.log(urlToJsonFileUncut);
        urlToJsonFile = urlToJsonFileUncut.slice(7);
        console.log(urlToJsonFile);
        return urlToJsonFile;
    });
    this.getData = function(urlToJsonFile) {
        console.log(urlToJsonFile);
        return $http.get('http://localhost:1337/' + urlToJsonFile).
    then(function(response) {
        console.log(response.data.realms[0].name);
        return response.data.realms[0].name;
    });
}});

javascript angularjs

Answer 1

Answer №1

$http is used for asynchronous requests. It is important to chain it inside the first request in order to ensure that the value of the first response is available when the second request is made.

di.service('testService', function($http) {
  var getData = function () {
    return $http.get('https://us.api.data/tichondrius?locale=en_US&apikey=xxxxxxxx').
    then(function(response) {
      var urlToJsonFileUncut = response.data.files[0].url;
      console.log(urlToJsonFileUncut);
      var urlToJsonFile = urlToJsonFileUncut.slice(7);
      console.log(urlToJsonFile);

      $http.get('http://localhost:1337/' + urlToJsonFile).
      then(function(response) {
        console.log(response.data.realms[0].name);
        return response.data.realms[0].name;
      });
    });
  }

  return { getData: getData; }
});

Answer 2

$http is used for asynchronous requests. It is important to chain it inside the first request in order to ensure that the value of the first response is available when the second request is made.

di.service('testService', function($http) {
  var getData = function () {
    return $http.get('https://us.api.data/tichondrius?locale=en_US&apikey=xxxxxxxx').
    then(function(response) {
      var urlToJsonFileUncut = response.data.files[0].url;
      console.log(urlToJsonFileUncut);
      var urlToJsonFile = urlToJsonFileUncut.slice(7);
      console.log(urlToJsonFile);

      $http.get('http://localhost:1337/' + urlToJsonFile).
      then(function(response) {
        console.log(response.data.realms[0].name);
        return response.data.realms[0].name;
      });
    });
  }

  return { getData: getData; }
});

Answer 3

Answer №2

My recommendation would be to implement a factory instead of a service

Take a look at the code snippet below:

di.factory('testService', function ($http) {
    var variable_name;

    var serviceMethodName = function () {
        $http.get('https://us.api.data/tichondrius?locale=en_US&apikey=xxxxxxxx').
        then(function (response) {
            var urlToJsonFileUncut = response.data.files[0].url;
            console.log(urlToJsonFileUncut);
            urlToJsonFile = urlToJsonFileUncut.slice(7);
            console.log(urlToJsonFile);
            variable_name = urlToJsonFile;          //added 
        });
    }

    //parameter modified in the method below
    var getData = function (variable_name) {

        var urlToJsonFile = variable_name;          //added 
        console.log(urlToJsonFile);
        return $http.get('http://localhost:1337/' + urlToJsonFile).
    then(function (response) {
        console.log(response.data.realms[0].name);
        return response.data.realms[0].name;
    });

    }

    //Exposes the two methods and accessible throughout the app unless explicitly modified
    return {
        serviceMethodName: serviceMethodName,
        getData:getData
    }

});

Answer 4

My recommendation would be to implement a factory instead of a service

Take a look at the code snippet below:

di.factory('testService', function ($http) {
    var variable_name;

    var serviceMethodName = function () {
        $http.get('https://us.api.data/tichondrius?locale=en_US&apikey=xxxxxxxx').
        then(function (response) {
            var urlToJsonFileUncut = response.data.files[0].url;
            console.log(urlToJsonFileUncut);
            urlToJsonFile = urlToJsonFileUncut.slice(7);
            console.log(urlToJsonFile);
            variable_name = urlToJsonFile;          //added 
        });
    }

    //parameter modified in the method below
    var getData = function (variable_name) {

        var urlToJsonFile = variable_name;          //added 
        console.log(urlToJsonFile);
        return $http.get('http://localhost:1337/' + urlToJsonFile).
    then(function (response) {
        console.log(response.data.realms[0].name);
        return response.data.realms[0].name;
    });

    }

    //Exposes the two methods and accessible throughout the app unless explicitly modified
    return {
        serviceMethodName: serviceMethodName,
        getData:getData
    }

});

Sharing data between functions within an AngularJS service

Answer №1

Answer №2

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