Closed
Description
Go version
go1.24
Output of go env in your module/workspace:
AR='ar'
CC='cc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='c++'
GCCGO='gccgo'
GO111MODULE=''
GOARCH='arm64'
GOARM64='v8.0'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/Users/08d2/Library/Caches/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/Users/08d2/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/3j/jnfkmqxn2pq4r58r0dcqg1k00000gn/T/go-build1706432072=/tmp/go-build -gno-record-gcc-switches -fno-common'
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMOD='/dev/null'
GOMODCACHE='/Users/08d2/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/08d2'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/homebrew/Cellar/go/1.24.2/libexec'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/Users/08d2/Library/Application Support/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/homebrew/Cellar/go/1.24.2/libexec/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.24.2'
GOWORK=''
PKG_CONFIG='pkg-config'What did you do?
https://pkg.go.dev/log/slog#TextHandler.Handle
If the Record's level is zero, the level is omitted. Otherwise, the key is "level" and the value of Level.String is output.
https://pkg.go.dev/log/slog#JSONHandler.Handle
If the Record's level is zero, the level is omitted. Otherwise, the key is "level" and the value of Level.String is output.
--
https://go.dev/play/p/gPX5U_TilI6
package main
import (
"context"
"log/slog"
"os"
"time"
)
func main() {
th := slog.NewTextHandler(os.Stderr, nil)
th.Handle(context.TODO(), slog.NewRecord(time.Now().UTC(), 0, "message 1", 0))
jh := slog.NewJSONHandler(os.Stderr, nil)
jh.Handle(context.TODO(), slog.NewRecord(time.Now().UTC(), 0, "message 2", 0))
}Handle gets Record values with level == 0 in both cases.
What did you see happen?
time=2009-11-10T23:00:00.000Z level=INFO msg="message 1"
{"time":"2009-11-10T23:00:00Z","level":"INFO","msg":"message 2"}
What did you expect to see?
time=2009-11-10T23:00:00.000Z level=INFO msg="message 1"
{"time":"2009-11-10T23:00:00Z","level":"INFO","msg":"message 2"}
The level value is not omitted. Which is correct, I think! The docs just need to be fixed.