QueryTask: Get Value out of executeForCount()

XuanKuai

How to get the value assigned inside queryTask.executeForCount() to use elsewhere outside of it? In the following example, I want flag = 1 when count > 0. But when I access flag outside of queryTask.executeForCount(), the value is not changed.

Note: the code runs in Web AppBuilder Developer Edition.

...
var flag = 0;
queryTask.executeForCount(query, lang.hitch(this, function(count) {
  if(count > 0) {
    flag = 1; // Suppose this one fires instead of flag = 0
  } else {
    flag = 0;
  }
}));
console.log(flag); // Still returns 0, I want it to return 1

 

RobertScheitlin__GISP

Xuan,

   You will need to start using function based programming methods and not in line code, like you are now. The code that needs to access the flag var needs to be called from the executeForCount handler. So normally I would put any code that needs access to a async process result inside its own function that is only called inside the result of the async promise result function.