Qlik Sense Mashup - Unloading Objects from Memory

[rbartley]

Hi everyone,

I am having some issues with memory when loading a large number of objects that include GeoAnalytics maps. Can someone tell me how to unload an object once loaded with app.getObject()?

I have experimented with getSessionObject but without any success e.g.:

mapMY5YMY=app.getObject('mapMY5YMY','4fe5658d-f64f-4d2f-8df3-3cf3d697b882').then(function(model){
  strQID= model.id;
  });

app.destroySessionObject(strQID);

Thanks in advance.

Richard

[rbartley]

Done.  Thanks to you both.

[rbartley]

Here's some more information that might prove useful to anyone else who needs to exporting the data behind the visualizations that was previously using the app.getObject method.

I originally hit an issue as follows

1) My original code using the app.getObject method I am able to export the data using:

 app.getObject(strDivID,strQID).then( function( model ) 
  {  

  $(strCmdID).prop('onclick',null).off('click');
  $(strCmdID).on('click', function() 
  {  
  model.exportData().then(function( reply ) {  
  console.log('qUrlModified', url);  
  console.log('reply', reply);  
  var url = 'http://' + config.host +'/auth'+reply.qUrl;
  window.open(url);
  });  
  });
  });

2) However, when I replace this with the app.visualization.get() method, I receive an error: "Uncaught TypeError: visModel.exportData is not a function"

app.visualization.get(strQID).then(function(vis){
  vis.show(strDivID);
  visModel=vis.model;


  $(strCmdID).prop('onclick',null).off('click');
  $(strCmdID).on('click', function(visModel) 
  {  

  visModel.exportData().then(function( reply ) {  
  console.log('qUrlModified', url);  
  console.log('reply', reply);  
  var url = 'http://' + config.host +'/auth'+reply.qUrl;
  window.open(url);
  }); 

  });
  });

After looking around on the community site, I noticed that some people had used the exportData method of the Table API, so I tried this and after a bit of further de-bugging, the following works fine:

app.visualization.get(strQID).then(function(vis){
  vis.show(strDivID);
  visModel=vis.model;
  var table = new Qlik.table(visModel);  
  $(strCmdID).prop('onclick',null).off('click');
  $(strCmdID).on('click', function(visModel) 
  {  
  table.exportData({download: true});
  });
});

[cpomeren003]

Hi Richard,

Do you maybe have a working example on how to close an object? I have tried everything in this thread, but I couldn't figure it out.

Thanks in advance!

[rbartley]

Hi Casper,

Basically, you use model.close() when you want to close the object.

app.getObject(strDivID,strQID).then( function( model ) 
{  

if(strExport =='y')
{

//configure for export of data
$(strCmdID).prop('onclick',null).off('click');
$(strCmdID).on('click', function() 
{  
exportData(model);
$(strCmdID).hide();


});
}
if(strQSType !='extension' && strQSType!='text/image')
{
//unload when navigate away from tab
$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
  var target = $(e.target).attr("href") // activated tab
  if (target!='#tab'+strHTMLTab)
  {
model.close();
  }
});
}

In the extract above, you will see that model.close() is called where the name of the tab clicked is not the same as that containing the object.  Whenever a tab is clicked I call the function which contains this extract.

I hope that this helps.

[cpomeren003]

Hi Richard,

Thanks for the reply. The thing is, I understand what you are doing (calling model.close() whenever the name of the tab isn't the same as the tab that contains the specific object. The problem is, I am also working with tabs and I just don't understand how I can make this work. I just can't translate your example to my mashup and I can't tinker with this because it's not really a working example.

Is there maybe a way to show a really simple html/js example that works? Because I am really curious on how you place your QV inside the html and how you replaced the app.getObject.inside your .js.

Thanks again for the help and the fast response.