style:log (#2014)

log/filter.go

@@ -66,13 +66,13 @@ func (f *Filter) Log(level Level, keyvals ...interface{}) error {
 	}
 	// fkv is used to provide a slice to contains both logger.prefix and keyvals for filter
 	var fkv []interface{}
-	if l, ok := f.logger.(*logger); ok {
+	l, ok := f.logger.(*logger)
-		if len(l.prefix) > 0 {
+	if ok && len(l.prefix) > 0 {
 		fkv = make([]interface{}, 0, len(l.prefix)+len(keyvals))
 		fkv = append(fkv, l.prefix...)
 		fkv = append(fkv, keyvals...)
 	}
-	} else {
+	if !ok {
 		fkv = keyvals
 	}
 	if f.filter != nil && f.filter(level, fkv...) {

log/helper_writer.go

@@ -19,10 +19,8 @@ func WithWriterLevel(level Level) WriterOptionFn {
 // WithWriteMessageKey set writerWrapper helper message key.
 func WithWriteMessageKey(key string) WriterOptionFn {
 	return func(w *writerWrapper) {
-		if key != "" {
 		w.helper.msgKey = key
 	}
-	}
 }
 
 // NewWriter return a writer wrapper.

log/log.go

@@ -37,7 +37,10 @@ func (c *logger) Log(level Level, keyvals ...interface{}) error {
 
 // With with logger fields.
 func With(l Logger, kv ...interface{}) Logger {
-	if c, ok := l.(*logger); ok {
+	c, ok := l.(*logger)
+	if !ok {
+		return &logger{logs: []Logger{l}, prefix: kv, hasValuer: containsValuer(kv)}
+	}
 	kvs := make([]interface{}, 0, len(c.prefix)+len(kv))
 	kvs = append(kvs, kv...)
 	kvs = append(kvs, c.prefix...)
@@ -47,22 +50,21 @@ func With(l Logger, kv ...interface{}) Logger {
 		hasValuer: containsValuer(kvs),
 		ctx:       c.ctx,
 	}
-	}
-	return &logger{logs: []Logger{l}, prefix: kv, hasValuer: containsValuer(kv)}
 }
 
 // WithContext returns a shallow copy of l with its context changed
 // to ctx. The provided ctx must be non-nil.
 func WithContext(ctx context.Context, l Logger) Logger {
-	if c, ok := l.(*logger); ok {
+	c, ok := l.(*logger)
+	if !ok {
+		return &logger{logs: []Logger{l}, ctx: ctx}
+	}
 	return &logger{
 		logs:      c.logs,
 		prefix:    c.prefix,
 		hasValuer: c.hasValuer,
 		ctx:       ctx,
 	}
-	}
-	return &logger{logs: []Logger{l}, ctx: ctx}
 }
 
 // MultiLogger wraps multi logger.