Databases
StackOverflow2013
Postsdbo
POAngularJS - Processing asynchronous data in service
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAngularJS - Processing asynchronous data in service
    primarykey
    data
    text
    <p>I want to get some asynchronous data in service, which needs to further processed there. The code is here at <a href="http://plnkr.co/edit/6SkzXK?p=preview" rel="nofollow">plnkr</a>, </p> <p>I simulate an async call with timeout, and once the data is received, the UI is updated. But, I also need to process the data in service (doubleData) and later use in my UI. Say, I need to augment the data with some specifics. </p> <p>Since, data is null when <code>{{doubleData()}}</code> is called, it never populates it. How can I achieve a way to process data further in my service(which is populated async - say $http)?</p> <h2>index.html</h2> <pre><code>&lt;!doctype html&gt; &lt;html ng-app="myApp"&gt; &lt;head&gt; &lt;script type="text/javascript" src="../../../angular-1.0.2/angular.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="script.js"&gt;&lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div ng-controller="MainCtrl"&gt; {{data}}&lt;br&gt; {{doubleData()}} &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <h2>script.js</h2> <pre><code>var app = angular.module('myApp',[]); app.factory('myService', function($timeout) { var data = [], doubleData = []; var myService = {}; myService.async = function() { $timeout(function(){ data.length = 0; for(var i = 0; i &lt; 10; i++){ data.push({val: Math.random()}); } }, 5000); }; myService.data = function() { return data; }; myService.doubleData = function() { doubleData = [] for (var i = 0; i &lt; data.length; i++) { doubleData.push({val: 10* data[i]}); }; return doubleData; }; return myService; }); app.controller('MainCtrl', function( myService,$scope) { myService.async(); $scope.data = myService.data(); $scope.doubleData = myService.doubleData; }); </code></pre> <h2>Output (after 5 sec):</h2> <pre><code>[{"val":0.4908415926620364},{"val":0.25592787051573396},{"val":0.8326190037187189},{"val":0.6478461190126836},{"val":0.8502937415614724},{"val":0.19280604855157435},{"val":0.06115643493831158},{"val":0.5100495833903551},{"val":0.4134843284264207},{"val":0.5548313041217625}] [{"val":null},{"val":null},{"val":null},{"val":null},{"val":null},{"val":null},{"val":null},{"val":null},{"val":null},{"val":null}] </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USbsr
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload