topic Re: Sequencing issues with app.getObject in Integration, Extension & APIs

Sequencing issues with app.getObject

rbartley — Fri, 30 Jun 2017 10:31:40 GMT

Dear all,

I am having some sequencing issues when working within a mashup and when trying to re-use an object to display a different chart and download the data from that chart. Most of the time it worked fine, but sometimes it returned an error VM5616 require.js:44 TypeError: Cannot read property 'then' of undefined. So, I am now trying to force the getObject call to be synchronous by calling a function setCurrentPriceChart which is not resolved until the app.getObject call has completed.

function setCurrentPriceChart(chartID)

function setCurrentPriceChart(chartID)
{
  var deferred = $.Deferred();
  currentPriceChart = app.getObject('chartPrice', chartID).then(function()
  {
  deferred.resolve();
  });
  return deferred;
}

I have a button called cmdPrice which I am using to download the data associated with the chart (see below), but when I write the currentPriceChart object details to the console the value is undefined and an error is returned: VM5616 require.js:44 TypeError: Cannot read property 'then' of undefined at the line var table = new qlik.table(model);

$('#cmdPrice').on('click', function() {
  console.log('cmdPrice clicked currentPriceChart=',currentPriceChart);

  if(typeof currentPriceChart.value!=="undefined")
  {
  //console.log('currentPriceChart.value',currentPriceChart.value);
  currentPriceChart.then(function(model){
  var table = new qlik.table(model);
  return table.exportData({download: true})
  })

  }
  else
  {
  console.log('setCurrentPriceChart strSelectedPageButton=',strSelectedPageButton);
  promise = setCurrentPriceChart(strSelectedPageButton);
  $.when(promise).then(function()
  {
  console.log('currentPriceChart=',currentPriceChart);
  currentPriceChart.then(function(model){
  var table = new qlik.table(model);
  return table.exportData({download: true})
  })

  });


  }

   
   
  });

Does anyone have any ideas?

Re: Sequencing issues with app.getObject

Anonymous — Tue, 20 Feb 2018 05:31:19 GMT

Hi Richard,

I encountered the same issue of sequencing in app.getObject.. Would be great if you could provide the solution..Its been a year you reported this issue and I guess you already might have resolved it...

Re: Sequencing issues with app.getObject

rbartley — Thu, 22 Feb 2018 09:47:34 GMT

Hi Kumar ,

In the end I didn't have enough time to investigate this fully. The following code should work though:

app.getObject('chartPriceEvolution','KxYbfG').then( function( vizModel ) {  
$('#cmdPriceAllPeriods').prop('onclick',null).off('click');
$('#cmdPriceAllPeriods').on('click', function() 
{  
vizModel.exportData().then(function( reply ) {  
var url = 'http://' + config.host +'/auth'+reply.qUrl;
window.open(url);
});  
}); 
});

Re: Sequencing issues with app.getObject

rbartley — Mon, 26 Feb 2018 12:16:43 GMT

Hi Kumar,

I just looked into this again and have a solution:

function setCurrentPriceChart(chartID)  
{  
  console.log('setCurrentPriceChart ',chartID);
  var deferred = $.Deferred();  
  currentPriceChart = app.getObject('chartPrice', chartID).then(function(vizModel)  
  {  
  deferred.resolve(); 
  
  $('#cmdPrice').on('click', function() {  
vizModel.exportData().then(function( reply ) {  
console.log('reply=',reply);
var url = 'http://' + config.host +'/auth'+reply.qUrl;
//console.log('qUrlModified', url); 
window.open(url);

});  
  }); 
  });  
  return deferred;  
}

Notice that the qURL has moved from reply.result.qURL to reply.qURL.