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frame.go
38 lines (30 loc) · 1.01 KB
/
frame.go
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package sqlutil
import (
"errors"
"github.com/grafana/grafana-plugin-sdk-go/data"
)
// NewFrame creates a new data.Frame with empty fields given the columns and converters
func NewFrame(columns []string, converters ...Converter) *data.Frame {
fields := make(data.Fields, len(converters))
for i, v := range converters {
fields[i] = data.NewFieldFromFieldType(v.FrameConverter.FieldType, 0)
fields[i].Name = columns[i]
}
return data.NewFrame("results", fields...)
}
// Append appends the row to the dataframe, using the converters to convert the scanned value into a value that can be put into a data.Frame
func Append(frame *data.Frame, row []interface{}, converters ...Converter) error {
if len(row) != len(converters) {
return errors.New("the number of rows must match the number of converters")
}
d := make([]interface{}, len(row))
for i, v := range row {
value, err := converters[i].FrameConverter.ConverterFunc(v)
if err != nil {
return err
}
d[i] = value
}
frame.AppendRow(d...)
return nil
}