SelectionIdBuilder withmatrixnode hiearchy

[jprmsn]

I'm struggling with setting the correct selection Ids to use with row selection, drill-though, and report page tooltips with my custom matrix visual.

Right now, I am creating IDs using .withMatrixNode and then passing an array of them to these functions.  Here's an example for a matrix row with two categories set:

0: e

dataMap: dim HealthSystem.Health System: [{…}]

key: "{"dim HealthSystem.Health System":[{"identityIndex":24}]}[]"

measures: []

1: e

dataMap: dim Facility.Facility: [{...}]

key: "{"dim Facility.Facility":[{"identityIndex":25}]}[]"

measures: []

When I call (for example selectionmanager.select) more than one selection ID (e.g. two categories), I get a message on my crossfiltered visuals that says: “We can’t display this visual because a measure is used in cross highlighting.  Please remove the measure or cross highlight”. None of my selection IDs include measures.

I need to be able to select multiple categories to  correctly filter my other visuals and also to be able to set the context for report page tooltips.  The stock matrix is able to do this, but I don't know what the selectionIds look like.

I couldn't find any matrix samples that handle a hierarchy.  Can anyone give me a steer?

Thanks.

John

[jprmsn]

I see from debugging a stock matrix that their should be a single selection ID that looks like this:

"{"comp":{"k":0,"l":{"col":{"s":{"e":"Table1"},"r":"Field"}},"r":{"const":{"t":1,"v":"Table2"}}}}"

That look familiar to anyone?  Trying to figure out how to construct it.

Thanks.

John

[jprmsn · Accepted solution]

The key here is to stack calls to the builder and not call createSelectionId until done.  So, for example, you can call .withMatrixNode for a row node, another row node, then a column node, then call create and you will end up with a Selection ID for the "intersection" of the two rows and the column.