diff --git a/os/gcmd/gcmd_command_object.go b/os/gcmd/gcmd_command_object.go
index 9b819065b..afa97ab86 100644
--- a/os/gcmd/gcmd_command_object.go
+++ b/os/gcmd/gcmd_command_object.go
@@ -202,21 +202,27 @@ func newCommandFromMethod(object interface{}, method reflect.Value) (command Com
 		if data == nil {
 			data = map[string]interface{}{}
 		}
+		// Handle orphan options.
+		for _, option := range command.Options {
+			if option.Orphan && parser.ContainsOpt(option.Name) {
+				data[option.Name] = "true"
+			}
+		}
+		// Default values from struct tag.
 		err = mergeDefaultStructValue(data, inputObject.Interface())
 		if err != nil {
 			return nil, err
 		}
 		// Construct input parameters.
 		if len(data) > 0 {
-
-		}
-		if inputObject.Kind() == reflect.Ptr {
-			err = gconv.Scan(data, inputObject.Interface())
-		} else {
-			err = gconv.Struct(data, inputObject.Addr().Interface())
-		}
-		if err != nil {
-			return
+			if inputObject.Kind() == reflect.Ptr {
+				err = gconv.Scan(data, inputObject.Interface())
+			} else {
+				err = gconv.Struct(data, inputObject.Addr().Interface())
+			}
+			if err != nil {
+				return
+			}
 		}
 
 		// Parameters validation.
diff --git a/os/gcmd/gcmd_command_run.go b/os/gcmd/gcmd_command_run.go
index d0efb1b59..49fd508b3 100644
--- a/os/gcmd/gcmd_command_run.go
+++ b/os/gcmd/gcmd_command_run.go
@@ -23,6 +23,9 @@ func (c *Command) Run(ctx context.Context) error {
 
 // RunWithValue calls custom function that bound to this command with value output.
 func (c *Command) RunWithValue(ctx context.Context) (value interface{}, err error) {
+	// Add built-in help option, just for info only.
+	c.Options = append(c.Options, defaultHelpOption)
+
 	// Parse command arguments and options using default algorithm.
 	parser, err := Parse(nil)
 	if err != nil {
@@ -57,8 +60,6 @@ func (c *Command) RunWithValue(ctx context.Context) (value interface{}, err erro
 }
 
 func (c *Command) doRun(ctx context.Context, parser *Parser) (value interface{}, err error) {
-	// Add built-in help option, just for info only.
-	c.Options = append(c.Options, defaultHelpOption)
 	// Check built-in help command.
 	if parser.ContainsOpt(helpOptionName) || parser.ContainsOpt(helpOptionNameShort) {
 		if c.HelpFunc != nil {
diff --git a/util/gtag/gtag_z_example_test.go b/util/gtag/gtag_z_example_test.go
new file mode 100644
index 000000000..124a8db45
--- /dev/null
+++ b/util/gtag/gtag_z_example_test.go
@@ -0,0 +1,28 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gtag_test
+
+import (
+	"fmt"
+
+	"github.com/gogf/gf/v2/frame/g"
+	"github.com/gogf/gf/v2/util/gmeta"
+	"github.com/gogf/gf/v2/util/gtag"
+)
+
+func ExampleSet() {
+	type User struct {
+		g.Meta `name:"User Struct" description:"{UserDescription}"`
+	}
+	gtag.Sets(g.MapStrStr{
+		`UserDescription`: `This is a demo struct named "User Struct"`,
+	})
+	fmt.Println(gmeta.Get(User{}, `description`))
+
+	// Output:
+	// This is a demo struct named "User Struct"
+}