Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Try your skills in the Power BI Dataviz World Championship! Round one ends June 26. Join now

Reply
rdegr
Helper I
Helper I

Help for selector JSON

What is represented by the value of the 't' attribute below? I need to build similar selectors, that doesn't seem to correspond to anything in the metadata for the related category. I'm trying to build a filter that lets you select different fields, then a value from the field, but createSelectionId() is creating selectors that filter across multiple fields which is not desired.

 

"{"selector":"{\"data\":[\"{\\\"comp\\\":{\\\"k\\\":0,\\\"l\\\":{\\\"col\\\":{\\\"s\\\":{\\\"e\\\":\\\"qtEmergencyRecords\\\"},\\\"r\\\":\\\"Year\\\"}},\\\"r\\\":{\\\"const\\\":{\\\"t\\\":4,\\\"v\\\":2017}}}}\"]}","highlight":false}"

3 REPLIES 3
hairstyledare55
New Member

Thanks for clarifying that it's a captured selector string from a Power BI visual interaction.

The t attribute inside the JSON ("t":4) typically represents the data type of the constant value. In Power BI's internal selector system:

  • t:1 is usually text/string

  • t:2 is boolean

  • t:3 is decimal/float

  • t:4 is integer

So "t":4, "v":2017 means you're filtering the Year column by the integer value 2017.

If you want to dive deeper into how selectors and JSON structures work for filtering and visualization, I recommend checking out some detailed tutorials and tools at @https://artdrivethru.com/json-formatter . They have useful resources on JSON formatting and selector logic that might help with your project.

For your use case, make sure to construct the createSelectionId() call carefully to target just one field at a time to avoid unwanted cross-field filtering.

Hope this helps!

irisp
New Member

First please format and validate your JSON data using 

 

Irisp, that's not "my" JSON, its a selector query string I captured while debugging selection activities. It's string data from a larger JSON object, thus the escapes. Can you answer my question?

Helpful resources

Announcements
Fabric Data Days is here Carousel

Fabric Data Days 2026

Don't miss out on Data Days, June 15 through August 7. Learn Fabric, Power BI, SQL, AI and more.

Power BI DataViz World Championships carousel

Power BI DataViz World Championships - June 2026

A new Power BI DataViz World Championship is coming this June! Don't miss out on submitting your entry.