diff --git a/cache/cache.go b/cache/cache.go
index c6a9da47..26e40fa3 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -16,7 +16,7 @@ import (
 // Cache interface contains all behaviors for cache adapter.
 // usage:
 //	cache.Register("file",cache.NewFileCache()) // this operation is run in init method of file.go.
-//	c := cache.NewCache("file","{....}")
+//	c,err := cache.NewCache("file","{....}")
 //	c.Put("key",value,3600)
 //	v := c.Get("key")
 //
diff --git a/parser.go b/parser.go
index a4ae4d17..01df2c4a 100644
--- a/parser.go
+++ b/parser.go
@@ -158,6 +158,9 @@ func genRouterCode() {
 }
 
 func compareFile(pkgRealpath string) bool {
+	if !utils.FileExists(path.Join(workPath, "routers", "commentsRouter.go")) {
+		return true
+	}
 	if utils.FileExists(path.Join(workPath, lastupdateFilename)) {
 		content, err := ioutil.ReadFile(path.Join(workPath, lastupdateFilename))
 		if err != nil {