Attribute expression in custom extension not working

master_t — Tue, 09 Jan 2018 11:19:27 GMT

Hi everyone

I'm writing a Visualization Extension for QlikSense, and I'm trying to add a custom expression to a measure so it will be evaluated for each row. As a guide, I'm using the example from the accepted answer here: Qliksense custom measure property for extension with expression value

Here's my definition:

definition : {

type : "items",

component : "accordion",

items : {

dimensions : {

uses : "dimensions",

min : 1

measures : {

uses : "measures",

min : 1,

items: {

VisibilityExpressionProperty : {

type: "string",

label: "Column visibility condition",

ref: "qAttributeExpressions.0.qExpression",

component: 'expression',

defaultValue: ""

}

sorting : {

uses : "sorting"

settings : {

uses : "settings",

items : {

initFetchRows : {

ref : "qHyperCubeDef.qInitialDataFetch.0.qHeight",

label : "Initial fetch rows",

type : "number",

defaultValue : 50

}

In the example I linked above, the author says that this should result in having the expression available in the hypercube, like this:

qHypercube.qDataPages[0].qMatrix.qAttrExps

However, this is not the case. As you can see, my matrix only contains the objects, but not the extra attribute:

Can anyone tell me why?

Also, is this stuff documented anywhere in the official documentation? I only found it by google searching....

Re: Attribute expression in custom extension not working

master_t — Thu, 11 Jan 2018 10:10:25 GMT

Solved it.

Apparently, the attribute only gets added if the value is not null. I thought that setting defaultValue: "" would give me an empty string, but apparently not, its treated as NULL.

topic Attribute expression in custom extension not working in Integration, Extension & APIs

Attribute expression in custom extension not working

Re: Attribute expression in custom extension not working