in selector json what is the 't' attribute

Hi rdegr,

I had a similar request andwas able to solve it in the following was:

1. I create an array of custom identities, in this case it uses the category as text, but that can be changed to SQExprBuilder.number if needed.

let categoryIdentities = categories.map((category) => {
    let sqlExpr = powerbi["data"].SQExprBuilder.equal(dataView.metadata.columns[0].expr, powerbi["data"].SQExprBuilder.text(category));
    return powerbi["data"].createDataViewScopeIdentity(sqlExpr);
});

# ref: https://github.com/liprec/powerbi-boxWhiskerChart/blob/89179879a7209b030245fd05c317eee2034db394/src/boxWhiskerChart.ts#L260

2. When I loop thru the individual catagories (=i variable)I use the following code to create the correct SelectionId identifier:

let selectionId = new SelectionId({ data: [ categoryIdentities[i] ] }, false);

# ref: https://github.com/liprec/powerbi-boxWhiskerChart/blob/89179879a7209b030245fd05c317eee2034db394/src/boxWhiskerChart.ts#L282

I added links to my solution for more reference and hope this can also work for your visual.

-JP