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Bug: Return empty plugins.DataTimeSeriesSlice when the frame field vector is epmty (#38587)

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* Add check if the vector is empty

* Use Rows() instead of Len() on field

* Remove redundant condition
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idafurjes 2021-08-26 16:39:50 +02:00 committed by GitHub
parent 5339275793
commit 568549e810
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1 changed files with 1 additions and 2 deletions
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pkg/services/alerting/conditions/query.go
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@ -308,7 +308,7 @@ func FrameToSeriesSlice(frame *data.Frame) (plugins.DataTimeSeriesSlice, error)
if tsSchema.Type == data.TimeSeriesTypeNot {
// If no fields, or only a time field, create an empty plugins.DataTimeSeriesSlice with a single
// time series in order to trigger "no data" in alerting.
if len(frame.Fields) == 0 || (len(frame.Fields) == 1 && frame.Fields[0].Type().Time()) {
if frame.Rows() == 0 || (len(frame.Fields) == 1 && frame.Fields[0].Type().Time()) {
return plugins.DataTimeSeriesSlice{{
Name: frame.Name,
Points: make(plugins.DataTimeSeriesPoints, 0),
@ -316,7 +316,6 @@ func FrameToSeriesSlice(frame *data.Frame) (plugins.DataTimeSeriesSlice, error)
}
return nil, fmt.Errorf("input frame is not recognized as a time series")
}
seriesCount := len(tsSchema.ValueIndices)
seriesSlice := make(plugins.DataTimeSeriesSlice, 0, seriesCount)
timeField := frame.Fields[tsSchema.TimeIndex]