DOM element loads before the data is passed into the controller - javascript

I have a factory which makes a call to the API using AJAX like so
App.factory("DashboardData", function($q) {
method = 'POST';
var fetchDataFromApi = function(url, data) {
code = null;
response = null;
return $.ajax({method: method, url: url, dataType: 'json', data: data}); };
return {
counters: function() {
var deferred = $q.defer();
return data = fetchDataFromApi('http://solmon.belgiumcampus.ac.za/api/data/getdashboarddata');}
};});
I then have a controller which calls to this factory and populates an array with the response that it receives like so
App.controller("DashboardWidgets", function($scope, DashboardData) {
var response = DashboardData.counters();
$scope.CounterData = [];
response.then(function(response) {
$scope.CounterData = [
response.onlineUnits,
response.offlineUnits,
response.overallVoltage,
response.overallCurrent,
response.maintenanceUnits
];
});
alert("Online from controller: " + $scope.CounterData[0]);});
If I take out the alert at the end then the DOM element does not display the data that is received. Why is this happening and how would you recommend I fix it?

Related

what is wrong with this code in angular?

In my console the error is coming "getIdData is not defined" what is wrong with my code. Here deal is my service and getIdData is my function in service.
$scope.editUserDetail = function editUserDetail(){
$scope.showEditView = !$scope.showEditView;
$scope.showSubmitView = !$scope.showSubmitView;
console.log(deal);
deal.getIdData().then(function successCb(data){
$scope.editIdOptionsData=data;
});
};
Please check working example here: Demo
You are forget to return service object from service.
i.e
Write following code in your service,
return service;
i.e
angular.module('account').service('deal', function deal($http, accountConfiguration, $q, $log, httpHelper) {
var service = {};
var baseUrl = account.app.url;
service.getIdData = function(data, accountId, decisionMakerDetail) {
var def = $q.defer();
var url = baseUrl + '/api/accountsusers/' + accountId + '?role=' + decisionMakerDetail;
httpHelper._$http({
method: 'post',
url: url,
data: data,
def: def
}, function(resp) {
def.resolve(resp.msg);
});
return def.promise;
};
return service;
});
Or as you are using service you can write it using this
angular.module('account').service('deal', function deal($http, accountConfiguration, $q, $log, httpHelper) {
var baseUrl = account.app.url;
this.getIdData = function(data, accountId, decisionMakerDetail) {
var def = $q.defer();
var url = baseUrl + '/api/accountsusers/' + accountId + '?role=' + decisionMakerDetail;
httpHelper._$http({
method: 'post',
url: url,
data: data,
def: def
}, function(resp) {
def.resolve(resp.msg);
});
return def.promise;
};
});
For more information please check - Services
Please clean your browser and inspect source.Look deal.getIdData() is loaded or not.May be it is not loaded.Please load properly.
The object you are sending as a parameter doesn't have the getIdData() function defined.
Change your log to:
console.log(deal.getIdData);
and then check whether it returns the function code/definition.
Here is a link with an example of how implement a factory and service.
Angular factory and service
You are not returning the object holding the service reference from you your service registration function. Change your code as below for it to work.
angular.module('account')
.service('deal', function deal($http, accountConfiguration, $q, $log, httpHelper) {
var service = {};
var baseUrl = account.app.url;
service.getIdData = function(data,accountId,decisionMakerDetail){
var def = $q.defer();
var url = baseUrl + '/api/accountsusers/' + accountId + '?role=' + decisionMakerDetail;
httpHelper._$http({
method: 'post', url: url, data: data, def: def
}, function (resp) {
def.resolve(resp.msg);
});
return def.promise;
};
return service;
});
S8nce you were not returning anything from the service, even though deal service gets registered, its value is undefined and when you try to access deal.getIddata() you get the aforementioned error

Promises in angularjs don't work

I have an factory that gets data from my backend:
as.factory("abbdata", function GetAbbData($http,$rootScope,$routeParams,$q) { //$q = promise
var deffered = $q.defer();
var data = [];
var abbdata = {};
abbdata.async = function () {
$http.get($rootScope.appUrl + '/nao/summary/' + $routeParams['id']).success(function(d) {
data = d.abbData;
deffered.resolve();
});
return deffered.promise;
};
abbdata.data = function() {
return data;
};
return abbdata;
});
A call my factory like this in my controller:
abbdata.async().then(function() {
$scope.abbData = abbdata.data(); //Contains data
});
When I do a console.log($scope.abbData) outside my service call, just underneath, the result Is undifined. Why? Should not the $scope.abbData contain the data from my service after I call it?
EDIT:
You need to pass the data that should be returned into the resolve function like this:
deffered.resolve(data);
EDIT:
To get the data in the controller do this:
abbdata.async().then(function(data) {
$scope.abbData = data; //Contains data
});
Why don't you simply return that value from the async call in the first place?
You can chain promises so by attaching a success handler in your factory and returning a value from that you can simplify your code to:
as.factory("abbdata", function GetAbbData($http,$rootScope,$routeParams) {
return {
async: function () {
return $http.get($rootScope.appUrl + '/nao/summary/' + $routeParams['id']).success(function(d) {
return d.data.abbData;
});
}
}
});
And then use it like
abbdata.async().then(function(data) {
$scope.abbData = data; //Contains data
});
if you console.log($scope.abbData) outside the service call it should show undefined, since the call is asynchronous.
abbdata.async().then(function() {
$scope.abbData = abbdata.data(); //Contains data
});
console.log($scope.abbData) // this should show undefined
The console.log($scope.abbData) just after setting the abbData should show the data
abbdata.async().then(function() {
$scope.abbData = abbdata.data(); //Contains data
console.log($scope.abbData) // this should show the data
});
EDIT
you can use abbData from your service call like for example
angular.module('myApp', []).controller('HomeCtrl', function($scope, abbdata){
var updateUI;
$scope.abbData = [];
abbdata.async().then(function() {
$scope.abbData = abbdata.data(); //Contains data
updateUI();
});
updateUI = function(){
//do something with $scope.abbData
}
});
EDIT 2
On response to your query, I would do something like,
angular.module('myApp', [])
.controller('JobsCtrl', function($scope, $jobService) {
$scope.jobs = [];
$jobService.all().then(function(jobs) {
$scope.jobs = jobs;
});
})
.service('$jobService', function ($q, $http) {
return {
all: function () {
var deferred = $q.defer();
$http({
url: 'http://url',
method: "GET"
}).success(function (data) {
deferred.resolve(data);
}).error(function () {
deferred.reject("connection issue");
});
return deferred.promise;
}
}
});
associated view
<body ng-app = "myApp">
<div ng-controller = "JobsCtrl">
<div ng-repeat="job in jobs track by job.id">
<a href="#/tab/jobs/{{job.id}}" class="item item-icon-right">
<h2>{{job.job_name}}</h2>
<p>DUE DATE: {{job.job_due_date}}</p>
</a>
</div>
<div>
</body>
Here the service an all function which returns a promise, i.e. it will notify when data is fetched.
in the controller the service is called and as soon the service call is resolved the $scope.jobs is assigned by the resolved data.
the $scope.jobs is used in the angular view. as soon as the jobs data are resolved, i.e. $scope.jobs is assigned, the view is updated.
hope this helps
I had a quick look, I have 2 ideas:
First theory: your service is returning undefined.
Second theory: you need to run $scope.$apply();
See this fiddler: https://jsfiddle.net/Lgfxtfm2/1/
'use strict';
var GetAbbData = function($q) {
//$q = promise
var deffered = $q.defer();
var data = [];
var abbdata = {};
abbdata.async = function () {
setTimeout(function() {
//1: set dummy data
//data = [200, 201];
//2: do nothing
//
//3: set data as undefined
//data = undefined;
deffered.resolve();
}, 100);
return deffered.promise;
};
abbdata.data = function() {
return data;
};
return abbdata;
};
var abbdata = GetAbbData(Q)
abbdata.async().then(function() {
console.log(abbdata.data()); //Contains data
});
I have stripped away a lot of dependencies and replaced $q with Q just for my own ease.
In the above example, I first attempted to run the code with dummy data, the console output the expected data, then I tried to not assign the data, and I get an empty array. This is why I assume that if you are seeing 'undefined' you must be explicitly setting the value to 'undefined'.
That aside, I also noticed that you were testing the result by reading directly from $scope. I know that when not inside the angular scope, doing operations on the $scope object does not necessarily happen in a timely manner, and typing $scope.$apply() usually fixes this. Usually, when using $http, angular keeps you in the appropriate scope, but you are creating your own promise using $q so this could be another potential issue.
Finally, the other two answers have pointed out that you are not using promises in the standard way. Although your code works fine, it is not normal to set your data directly onto your service and retrieve it from there. You can keep your service stateless by simply resolving your promise with the data that you want to process in the then method as shown by the answers by Anzeo and Markus.
I hope I was able to find the solution, good luck.
Dipun
as.factory("abbdata", function GetAbbData($http,$rootScope,$routeParams,$q) { //$q = promise
var deffered = $q.defer();
var data = [];
var abbdata = {};
abbdata.async = function () {
$http.get($rootScope.appUrl + '/nao/summary/' + $routeParams['id']).success(function(d) {
data = d.abbData;
deffered.resolve(data);
});
return deffered.promise;
};
abbdata.data = function() {
return data;
};
return abbdata;
});

Posting a model to the controller

I asked a question to fill in the model data on the client, into arrays.
Add items to JSON objects
Now my problem is how to post it to the controller. I have tried this:
public ActionResult ItemRequest (Model1 model)
{
////
}
but it never gets there.
I'm trying with an AJAX request to send it:
function sendRequest() {
jsonData.items = itemArray;
$.ajax({
url: '#Url.Action("ItemRequest")',
type: 'POST',
data: JSON.stringify(jsonData),
///// and so on
}
But the action result is never invoked. I can drop the 'JSON.stringify' and it makes no difference. Any ideas on how to post this object to the controller?
If I make a psuedo model in JS it works fine, but I don't want to have to make this model, I'd rather use the model passed to the page.
function itemModel () {
var self = this;
this.itemNumber = $("#itemNumberId").val();
/// etc.
self.items = [];
}
function itemsModel () {
var self = this;
this.itemNumber = $("#itemNumberId").val();
/// etc
}
then
var itemCount = 0;
function addItem() {
var newItem = new itemModel();
newItem.items[itemCount] = newItem;
/// etc
}
This works fine.
I send the array itemModel the same way with a JSON.stringify directly into the controller method
public ActionResult ItemRequest(ItemModel model)
We are using this to send Data to API controller Methods on our internal test sides:
It's probably not the prettiest solution, but it can be used on any page.
What data should be sent:
$("#btnSend").click(function () {call("controller/method", {ParamName: $("#field").val()}); });
To send the data to a controller:
$(document).ready(function () {
var call = function (method, requestData, resultHandler) {
var url = method.substring(0, 1) == "/api/" + method;
$.ajax({
url: url,
dataType: 'json',
data: JSON.stringify(requestData),
type: 'POST',
contentType: 'application/json',
success: function (data) {
var isSuccess = data.Status == "success";
$("#jsonResponse").val(FormatJSON(data));
if (isSuccess && jQuery.isFunction(resultHandler)) {
resultHandler(data);
}
}
});
};

Creating a module on JS that have to get data from a RESTFUL API

Hi I was creating a JS module that I want to use in the way:
var dataCollection = new dataCollectionSetup();
var collectedData = dataCollection.getMeasures(2);
My issue is that I want to get data from a Restfull Api and that will be asynchronously. I create this module but I am stuck on how create the promise inside the function or something that allow me call the getMeausre in the way that I showed or like this dataCollection.getMeasures(2).then(UpdatecoolectedData(res)).
var dataCollectionSetup = function () {
var getMeasuresByTrainingDomainId = function (tdId)
{
var jsonResponse;
fnSuccess = function (data, status, request) {
jsonResponse = data;
return jsonResponse
};
fnError = function () {
alert("Error getting Maasures by Training Domain");
}
$.ajax({
type: "GET",
url: "/datacollection/Measures/" + timelineId,
complete: fnSuccess,
error: fnError
});
}
var getMetrics = function () {
var result = CallApiForMetrics()
return result;
}
return {
getMeasures: getMeasuresByTrainingDomainId,
getNetric: getMetrics
}
}
Thank you
Just make the following change to your function getMeasuresByTrainingDomainId
return $.ajax({
type: "GET",
url: "/datacollection/Measures/" + timelineId,
complete: fnSuccess,
error: fnError
});
If you look the jquery documentation for the ajax method, implement the Promise interface, and you can use it like this:
var dataCollection = dataCollectionSetup();
dataCollection.getMeasures(2).then(function(){/*your coode*/})

Assign value to global variable using $.Ajax (JQuery)

I am creating new functionality where I build a grid based on Json data returned from Ajax. I have decided I want to encapsulate this functionality within a function, so when I add/update/delete, I can on success retrieve a new representation of the data.
The problem I am having is I want to fill a global array but once my function that uses AJAX ends, I have an Array but no data. This isn't a problem when all the code is within the AJAX call but once I try to separate this in to its own function, it doesn't work as intended.
<script type="text/javascript">
var DataArray = [];
// Use this function to fill array
function retrieveNotes() {
$.ajax({
url: "http://wks52025:82/WcfDataService.svc/GetNotesFromView()?$format=json",
type: "get",
datatype: "json",
asynch:true,
success: function (data) {
returnedData = data;
$.each(data.d, function (i, item) {
DataArray[i] = [];
DataArray[i][0] = item.NotesTitle.trim();
DataArray[i][1] = item.ProfileName.trim();
DataArray[i][2] = item.IsShared;
DataArray[i][3] = item.NameOfUser.trim();
}) // End of each loop
}
});
}
$(document).ready(function () {
retrieveNotes();
DataArray;
</script>
It's asynchronous, so you'll have to wait for the ajax call to finish before you can use the data :
function retrieveNotes() {
return $.ajax({
url: "http://wks52025:82/WcfDataService.svc/GetNotesFromView()?$format=json",
type: "get",
datatype: "json"
});
}
$(document).ready(function () {
retrieveNotes().done(function(data) {
var DataArray = [];
$.each(data.d, function (i, item) {
DataArray[i] = [];
DataArray[i][0] = item.NotesTitle.trim();
DataArray[i][1] = item.ProfileName.trim();
DataArray[i][2] = item.IsShared;
DataArray[i][3] = item.NameOfUser.trim();
});
// you can only use the data inside the done() handler,
// when the call has completed and the data is returned
});
});

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