dataViewMappings for hierarchy summaries (custom visual)

[mastone]

I'm trying to develop my first power bi visual and struggling a bit.  I am not understanding how to get summary data at the hieararchy level.  

What I am attempting to do is get summary data at the parent level that summaries the data show in the bar charts.  You will notice that each level has 0% in the picture.  This is what I am trying to tackle and there will be up to 4 levels of hiearchy typically.

My data view mappings and data roles are below.   I have data that power bi hands the visual and is what was used to generate the image above....I would attach it but I don't see a way to attach the file and I can't paste it in as it's betwee 3500 and 52K lines long depending on the hierarchy level.

Any thoughts on what I can do to have power bi calculate the hiearchy levels just like the matrix does?  Here is a sample of similar data in the matrix visual (not my visual) that does the desired summary.

"dataRoles": [

        {

            "name": "Category",

            "displayName": "Category",

            "displayNameKey": "Visual_Category",

            "kind": "Grouping"

        },

        {

            "name": "Scored",

            "displayName": "Scored",

            "displayNameKey": "Visual_Scored",

            "kind": "Measure"

        },

        {

            "name": "ScorePercent",

            "displayName": "Score Percent",

            "displayNameKey": "Visual_ScorePercent",

            "kind": "Measure"

        }

    ],

 "dataViewMappings": [

        {

            "matrix": {

                "rows": {

                    "for": {

                        "in": "Category"

                    }

                },

                "values": {

                    "select": [

                        {

                            "for": {

                                "in": "Scored"

                            }

                        },

                        {

                            "for": {

                                "in": "ScorePercent"

                            }

                        }

                    ]

                }

            }

        }

    ],

[mastone]

@dm-p Thank you so much for pointing me in the right direction.  I took me quite a while to figure it out (I didn't understand the doucmentation initially)....but after some fiddling, I got everything to work.

Thanks again!

[dm-p · Accepted solution]

Hi @mastone,

All you can currently do is use the totals and subtotals API to request aggregated data, if using the matrix dataViewMapping. If you don't have this set up in your visual capabilities already, then I would suggest attempting to add it in as per the documentation.

If you have tried this, then there is currently no other way to aggregate the data view and you will need to contact Microsoft to request the feature you feel is missing.

Regards,

Daniel

[mastone]

Thank you dm-p!   I didn't even know that api existed.  This is very helpful.  I'll give that a shot.