diff --git a/example/bookstore/rpc/model/bookmodel.go b/example/bookstore/rpc/model/bookmodel.go
index 094cdd35..76f9483f 100755
--- a/example/bookstore/rpc/model/bookmodel.go
+++ b/example/bookstore/rpc/model/bookmodel.go
@@ -18,7 +18,7 @@ var (
 	bookRowsExpectAutoSet   = strings.Join(stringx.Remove(bookFieldNames, "create_time", "update_time"), ",")
 	bookRowsWithPlaceHolder = strings.Join(stringx.Remove(bookFieldNames, "book", "create_time", "update_time"), "=?,") + "=?"
 
-	cacheBookBookPrefix = "cache#Book#book#"
+	bookPrefix = "cache#Book#book#"
 )
 
 type (
@@ -46,9 +46,9 @@ func (m *BookModel) Insert(data Book) (sql.Result, error) {
 }
 
 func (m *BookModel) FindOne(book string) (*Book, error) {
-	bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, book)
+	bookKey := fmt.Sprintf("%s%v", bookPrefix, book)
 	var resp Book
-	err := m.QueryRow(&resp, bookBookKey, func(conn sqlx.SqlConn, v interface{}) error {
+	err := m.QueryRow(&resp, bookKey, func(conn sqlx.SqlConn, v interface{}) error {
 		query := `select ` + bookRows + ` from ` + m.table + ` where book = ? limit 1`
 		return conn.QueryRow(v, query, book)
 	})
@@ -63,19 +63,19 @@ func (m *BookModel) FindOne(book string) (*Book, error) {
 }
 
 func (m *BookModel) Update(data Book) error {
-	bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, data.Book)
+	bookKey := fmt.Sprintf("%s%v", bookPrefix, data.Book)
 	_, err := m.Exec(func(conn sqlx.SqlConn) (result sql.Result, err error) {
 		query := `update ` + m.table + ` set ` + bookRowsWithPlaceHolder + ` where book = ?`
 		return conn.Exec(query, data.Price, data.Book)
-	}, bookBookKey)
+	}, bookKey)
 	return err
 }
 
 func (m *BookModel) Delete(book string) error {
-	bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, book)
+	bookKey := fmt.Sprintf("%s%v", bookPrefix, book)
 	_, err := m.Exec(func(conn sqlx.SqlConn) (result sql.Result, err error) {
 		query := `delete from ` + m.table + ` where book = ?`
 		return conn.Exec(query, book)
-	}, bookBookKey)
+	}, bookKey)
 	return err
 }
diff --git a/go.sum b/go.sum
index ab115321..916a67be 100644
--- a/go.sum
+++ b/go.sum
@@ -425,6 +425,7 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=