topic Re: Get variable value after setting it? in Integration, Extension & APIs

Get variable value after setting it?

dhdezrino — Thu, 22 Jun 2017 13:57:50 GMT

Hello people,

How can I get the variable value after setting it using app.variable.setStringValue?

It doesn't seem to change using app.variable.getByName or app.variable.getContent (Maybe I'm using them wrong)
I'm making a button that can set and unset a variable or filter in a field, but I cant seem to retrieve the variable to carry the pressed style over the next page

Thank you

Re: Get variable value after setting it?

nikoskavroulaki — Tue, 21 Nov 2017 11:09:07 GMT

Any hints as to what is the solution?

I am facing the same issue.

Re: Get variable value after setting it?

_jespers_ — Tue, 21 Nov 2017 15:28:12 GMT

Hi,

Is this maybe something that you are after?

qix.app.getVariableByName("variableName").then(function(variable){
    variable.getLayout().then(function(variableLayout) {
        console.log("variableLayout", variableLayout);
    });
});

Re: Get variable value after setting it?

nikoskavroulaki — Tue, 21 Nov 2017 16:00:08 GMT

I use this code to get the variable val

        var app = qlik.currApp(this);

        var qix = this.backendApi.model.enigmaModel.session;
        var numericValue;
        qix.app.getVariableByName('vTestMode').then(function (variable) {
            variable.getLayout().then(function (variableLayout) {
                numericValue = variableLayout.qNum;
            });
        });

but i seem to get Cannot read property 'model' of undefined error?

Re: Get variable value after setting it?

Aiham_Azmeh — Wed, 22 Nov 2017 06:55:07 GMT

Hi nikoskavroulakis‌,

You shouldn't use unsupported method - those may/will change over time, instead use the Variable API ‒ Qlik Sense Developers

let app = qlik.currApp(this);  
let numericValue;  
app.variable.getByName('vTestMode').then(variableModel => {
     variableModel.getLayout().then(variable => {
          numericValue = variableLayout.qNum;  
     });
});

I hope this helps

Re: Get variable value after setting it?

_jespers_ — Wed, 22 Nov 2017 07:43:24 GMT

Hi Aiham,

Isn't the Qlik Engine API supported, or why isn't my suggestion a way to go?

Re: Get variable value after setting it?

Aiham_Azmeh — Wed, 22 Nov 2017 09:02:23 GMT

The enigmaModel is not documented/supported and may change, the engine API is supported, but they are not the same, some enigma methods are mixins that make data transformation.

so for example (not likely to change but anyway as an example), getVariableName may change from returning a model to actually return the variable result, which can break your extensions.

Re: Get variable value after setting it?

_jespers_ — Wed, 22 Nov 2017 09:05:58 GMT

Ok, thank you for the explanation