how to get last item from selection array in mashup

[mk09123]

Hello 

I am using the below code for getting selection in my mashup

let fieldData = app.field('FinancialYear').getData()
console.log(fieldData.rows)
console.log(fieldData.rows.length) // getting 0 everytime 

So the issue is whenever I run the above code I am getting 0 lengths (cause I think that code gets run before the array is found )

so what I am trying to do is I want the last value of the array (2022-2023)

But after the dom load, I am getting 0 that the issue.

any help??

[SerhanKaraer]

Hello mk,

getdata is an async operation, so you have to wait for it to end.

Use help site:

https://help.qlik.com/en-US/sense-developer/November2022/Subsystems/APIs/Content/Sense_ClientAPIs/Ca...

You can find a lot of stuff on this forum: Integration, Extension & APIs

[mk09123]

Hello SerhanKaraer,

Thanks for reply

As per the example which you share I have added below code in Js file.

 var fieldData = app.field('FinancialYear').getData();
		fieldData.OnData.bind( function(){
			fieldData.rows.forEach(function(row){
			console.log(row.qElemNumber)	
		})
	})
		
fieldData.field('FinancialYear').select([0,1,2],true,true)

But now I am getting below error 

[SerhanKaraer]

Hi,
There seems a problem with the documentation.

It must be like this:

 var fieldData = app.field('FinancialYear').getData();
		fieldData.OnData.bind( function(){
			fieldData.rows.forEach(function(row){
			console.log(row.qElemNumber)	
		})
	})
		
app.field('FinancialYear').select([0,1,2],true,true)

[mk09123]

Hello SerhanKaraer,

Thanks for reply

   var fieldData = app.field('FinancialYear').getData();
   
		fieldData.OnData.bind( function(){
		let value =[];
		fieldData.rows.forEach(function(row){		
			value.push(row.qText)
		})
		console.log([value.length -1 ])
		app.field('FinancialYear').select([value.length -1 ],true,true)
	})
	

Now I am getting the last array value in the console and in selection as well 

But now the console and selection value getting triggered each sec (so when you remove the selection it's get added automatically)

[SerhanKaraer]

Hi,

When selection state changes on the server, the clients are updated with new selection state. This is the default behavior of QS. If you do not what to be updated, you have to unbind the listener as below:

var fieldData = app.field('FinancialYear').getData();

let value =[];

var listener = function() {
   fieldData.rows.forEach(function(row){		
      value.push(row.qText)
   })
   console.log([value.length -1 ])
   fieldData.OnData.unbind( listener );
}

fieldData.OnData.bind( listener )
app.field('FinancialYear').select([value.length -1 ],true,true)

If you want to be updated, just comment the line with unbind method.

[mk09123]

Hello SerhanKaraer,

Try with your code, but somehow it's not working as expected 

Not getting any selection or console after adding the code 

Thanks in advance

[SerhanKaraer]

Just corrected parentheses and braces @mk09123 

[mk09123]

Hi SerhanKaraer,

Can you please correct and share the same 

cause I tried but it's not working