Portal.queryItems callback function execution timing

NartTamash — Sat, 11 Dec 2021 10:44:34 GMT

Hi all,

I've got the following scenario...I'm querying my local Portal for certain items and then I am processing them using a callback function, as soon as the query returns them.

globalVariable
     //...

     function doSomeOtherStuff() {
          //do some other stuff
          //requires the updated globalVariable
     };

     Portal.queryItems(params).then(processItems)
     
     doSomeOtherStuff();

     function processItems(items) {
          //do something
          //update globalVariable
     };

     //...

Giving this is an async call, other things (i.e. doSomeOtherStuff()) carry on while the query is finalised and the items processed.

How can I wait for the processItems() to complete before doing anything else (so a synchronous operation in a sense)?

The processItems function updates a global variable that I need to use in doSomeOtherStuff() and carry on with the logic. I can't execute doSomeOtherStuff() within processItems() because due to the nature of it, it will take doSomeOtherStuff() out of scope.

Hope this makes sense, I've tried to simplify as much as possible.

Re: Portal.queryItems callback function execution timing

RobertScheitlin__GISP — Wed, 11 May 2016 13:52:59 GMT

Nart,

This is where a Deferred comes into play.

dojo/Deferred — The Dojo Toolkit - Reference Guide

Re: Portal.queryItems callback function execution timing

NartTamash — Wed, 11 May 2016 14:57:03 GMT

Right...so what I needed was a chained promise. Sort of tried that before but didn't work cause I didn't know what I was doing

Always on the watch, Robert! Appreciate it!

topic Portal.queryItems callback function execution timing in ArcGIS JavaScript Maps SDK Questions

Portal.queryItems callback function execution timing

Re: Portal.queryItems callback function execution timing

Re: Portal.queryItems callback function execution timing