topic Selections not populated after reload? in Integration, Extension & APIs

Selections not populated after reload?

BradMazurek — Sat, 16 Nov 2024 03:43:53 GMT

(Edited to add code and images.)

In my extension's paint() method, I am accessing the selectionState().selections array. All seems to work fine generally, but when I do a reload of the webpage, the selections array is empty when paint() is called. A subsequent interaction that causes paint() to be called again finds the selections array populated.

Have I got some sort of race condition where the app has yet to load/cache the current selections?

Here is some sample code:

define(["qlik","css!./styles.css"], function (qlik) { return { support : { snapshot: false, export: false, exportData : false }, paint: function ($element) { console.log(qlik.currApp().selectionState()); console.log(qlik.currApp().selectionState().selections); return qlik.Promise.resolve(); } }; } );

And here are images demonstrating my issue:

1. I currently have three Fields (4 Field Values) selected.

2. When I reload my JS console shows the following. Note the highlighted parts.

3. When I then open those interactively in the console, they are populated.

Thus, at the time paint() is called, my extension does not have the correct information about what is selected.

Re: Selections not populated after reload?

Harsh_Gohil — Thu, 26 Dec 2019 04:28:19 GMT

hello,

can you please provide demo of your code?

Regards,

Harsh Gohil

Re: Selections not populated after reload?

BradMazurek — Mon, 30 Dec 2019 20:42:59 GMT

I think I figured it out.

The selections may not yet be loaded, so I should bind a listener to

qlik.currApp().selectionState().OnData

I would suggest the documentation be updated to indicate a few things:

The content of qlik.app.selectionState() is indeterminate until after an OnData event is received any associated listeners.
Some indication of under what circumstances the OnData event is triggered. (Obviously during a selection, but also during page load. Are there more cases?)