Question

I ve reduced my code to the following short example. In it, I want to query for a set of iterations, and then in the callback, loop over the iterations and sum the resources. There is a global variable in which I d like to store the sum... but I can t get this to work.

The specific problem is that the query (and associated callback) are run after the other processing.

<html><!-- COMMENT -->

    <meta name="Name"    content="YOUR APP NAME HERE" /> 
    <meta name="Version" content="0.1" /> 
    <meta name="Vendor"  content="YOUR COMPANY NAME HERE" /> 

<!-- Rally SDK --> <script type="text/javascript" src="/apps/1.25/sdk.js"></script>

<!-- App script -->  <script> 

var rallyDataSource; var resourceSum = -1; 

function ProcessIterations(results) {
    alert("In ProcessIterations");  
    var resourceSum = 0; 
    for (iIter = 0; iIter < results.iterations.length; iIter++) {
      var iteration = results.iterations[iIter] ;
      resourceSum += iteration.Resources; 
    }
    alert("In ProcessIterations, resourceSum="+resourceSum);   }

function queryError () {
    alert("A query error occurred");   }

function runMainQuery() {   var today = dojo.date.stamp.toISOString(new Date(), {milliseconds: true, zulu: true});

  var queryObject = {
    key: "iterations",
    type: "Iteration",
    fetch: "Name,ObjectID,Resources,Project",
    order: "EndDate asc",
    query: "(Project.ObjectID != "__PROJECT_OID__")"
    };

  rallyDataSource.findAll(queryObject, ProcessIterations, queryError); }


function Main() {   rallyDataSource = new rally.sdk.data.RallyDataSource("__WORKSPACE_OID__", "__PROJECT_OID__",
                "__PROJECT_SCOPING_UP__", "__PROJECT_SCOPING_DOWN__");

  runMainQuery() ;

  var tableConfig = {
       columnKeys    : [ planEst ],
       columnHeaders : [ Plan Estimate ]   };   var table = new rally.sdk.ui.Table(tableConfig);   table.setCell(0,0,resourceSum) ;   table.display("app_div");  

}

rally.addOnLoad(Main);

</script> <body>
    <div id="app_div"></div> 
    <div id="error_div"></div>  </body> </html>

Answer 1

It can be a little tricky to get the hang of asynchronous callbacks but you re really close. Basically if you just move the creation of your table from Main to up in your ProcessIterations callback you should be good:

function ProcessIterations(results) {
    alert("In ProcessIterations");  
    var resourceSum = 0; 
    for (iIter = 0; iIter < results.iterations.length; iIter++) {
      var iteration = results.iterations[iIter] ;
      resourceSum += iteration.Resources; 
    }
    alert("In ProcessIterations, resourceSum="+resourceSum);   }

    var tableConfig = {
       columnKeys    : [ planEst ],
       columnHeaders : [ Plan Estimate ]   };   
      var table = new rally.sdk.ui.Table(tableConfig);   
      table.setCell(0,0,resourceSum) ;   
      table.display("app_div"); 
}

function Main() {   
    rallyDataSource = new rally.sdk.data.RallyDataSource("__WORKSPACE_OID__", "__PROJECT_OID__",
            "__PROJECT_SCOPING_UP__", "__PROJECT_SCOPING_DOWN__");
    runMainQuery() ;
}

That way you won t display your table until the data is available from your rallyDataSource.findAll call and your resourceSum has been calculated.

As an additional resource checkout some of the examples in our help documentation on using RallyDataSource and async callbacks: http://developer.rallydev.com/help/rally-data-source

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