Error: Bad filter type

[Jaymin-adzmedia]

Hello,

I am applying filter in topN query. I am getting below error:

2|DSP-api | Error: Bad filter type: in
2|DSP-api | at Function.filter (/home/ec2-user/reports/dsp_reports/node_modules/druid-query/lib/fields/filter.js:23:11)
2|DSP-api | at downloadAiBidCSV (/home/ec2-user/reports/dsp_reports/controllers/ReportController.js:1250:34)
2|DSP-api | at Layer.handle [as handle_request] (/home/ec2-user/reports/dsp_reports/node_modules/express/lib/router/layer.js:95:5)

I am using druid in node js with 2.1.0 version.

Thanks