prefix before everything

fields.go

@@ -2,9 +2,14 @@ package log
 
 func (l myLogger) WithFields(fields Fields) Logger {
 	if l.data != nil && len(l.data) > 0 {
-		for k, v := range fields {
-			l.data[k] = v
+		f := Fields{}
+		for k, v := range l.data {
+			f[k] = v
 		}
+		for k, v := range fields {
+			f[k] = v
+		}
+		l.data = f
 	} else {
 		l.data = fields
 	}

logger_prefix.go

@@ -9,7 +9,7 @@ func (l myLogger) Prefix(p ...string) Logger {
 	var buffer strings.Builder
 	buffer.WriteString(l.prefix)
 	for _, prefix := range p {
-		buffer.WriteString(fmt.Sprintf("%s: ", prefix))
+		buffer.WriteString(fmt.Sprintf("%s ", prefix))
 	}
 	logger := myLogger{Writer: l.Writer, ErrWriter: l.ErrWriter, prefix: buffer.String(), data: l.data}
 	return logger

my_logger.go

@@ -53,7 +53,7 @@ func (l myLogger) log(flag uint8, s ...interface{}) {
 			w = l.Writer
 		}
 	}
-	f := fmt.Sprintf("%s%s msg=%q%s", logPrefix(flag), l.prefix, fmt.Sprint(s...), l.data)
+	f := fmt.Sprintf("%s%s msg=%q%s", l.prefix, logPrefix(flag), fmt.Sprint(s...), l.data)
 	fmt.Fprintln(w, f)
 }
 
@@ -67,7 +67,7 @@ func (l myLogger) logf(flag uint8, format string, s ...interface{}) {
 		}
 	}
 	format = fmt.Sprintf("%%s%%s msg=\"%s\"%s\n", format, l.data)
-	s = append([]interface{}{logPrefix(flag), l.prefix}, s...)
+	s = append([]interface{}{l.prefix, logPrefix(flag)}, s...)
 	fmt.Fprintf(w, format, s...)
 }