Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowTry your skills in the Power BI Dataviz World Championship! Round one ends June 26. Join now
Hello everyone,
I'm trying to create a custom visual based on D3's Visavail, the linked example defines two datasets: catagories and data:
var dataset = [{ "measure": "Fat Bike", "categories": { // category names and their colors defined here "Kim": { "color": "#377eb8" }, "Bert": { "color": "#ff7f00" }, "Zoe": { "color": "purple" }, }, "data": [ ["2016-01-01 12:00:00", "Kim", "2016-01-01 13:00:00"], ["2016-01-01 14:22:51", "Zoe", "2016-01-01 16:14:12"], ["2016-01-01 16:14:12", "Bert", "2016-01-01 17:14:12"], ["2016-01-01 19:20:05", "Zoe", "2016-01-01 20:30:00"] ] }];
Question:
how do I define two different tables in my dataViewMappings, one for the categories and one for the data?
Dataroles:
Here is a screenshot of my data, the chart is succesfully created with pre-defined data.
DataViewMapping:
Why is the datamapping below not creating two tables?
"dataViewMappings": [
{
"conditions":[
{
"DownTimes":{
"max": 3
}
}
],
"table": {
"rows": {
"for": { "in": "DownTimes" }
}
}
},
{
"conditions":[
{
"Begin":{
"max": 1
},
"End":{
"max": 1
},
"RedenIndex":{
"max": 1
}
}
],
"table": {
"rows": {
"select":[
{"for": { "in": "Begin" }},
{"for": { "in": "End" }},
{"for": { "in": "RedenIndex" }}
]
}
}
}
]
I included the total project folder: Here (zip)
Solved! Go to Solution.
Power BI Custom Visuals API does not support multi data view mappings.
You should use a single dataViewMapping to get all of data.
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
Power BI Custom Visuals API does not support multi data view mappings.
You should use a single dataViewMapping to get all of data.
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
Don't miss out on Data Days, June 15 through August 7. Learn Fabric, Power BI, SQL, AI and more.
Check out the May 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 2 | |
| 2 | |
| 1 | |
| 1 | |
| 1 |