Fixes radius-project#7391 - fixing error in rad group show for no args

Signed-off-by: Nick Beenham <1985327+superbeeny@users.noreply.github.com>

pkg/cli/cmd/group/show/show.go

@@ -26,6 +26,8 @@ import (
 	"github.com/radius-project/radius/pkg/cli/framework"
 	"github.com/radius-project/radius/pkg/cli/output"
 	"github.com/radius-project/radius/pkg/cli/workspaces"
+	"github.com/radius-project/radius/pkg/ucp/resources"
+	resources_radius "github.com/radius-project/radius/pkg/ucp/resources/radius"
 	"github.com/spf13/cobra"
 )
 
@@ -99,9 +101,18 @@ func (r *Runner) Validate(cmd *cobra.Command, args []string) error {
 	if format == "" {
 		format = "table"
 	}
-	resourcegroup, err := cli.RequireUCPResourceGroup(cmd, args)
-	if err != nil {
-		return err
+	var resourcegroup string
+	if len(args) == 1 {
+		resourcegroup, err = cli.RequireUCPResourceGroup(cmd, args)
+		if err != nil {
+			return err
+		}
+	} else {
+		id, err := resources.ParseScope(workspace.Scope)
+		if err != nil {
+			return err
+		}
+		resourcegroup = id.FindScope(resources_radius.ScopeResourceGroups)
 	}
 
 	r.Format = format

pkg/cli/cmd/group/show/show_test.go

@@ -42,6 +42,15 @@ func Test_Validate(t *testing.T) {
 	configWithWorkspace := radcli.LoadConfigWithWorkspace(t)
 
 	testcases := []radcli.ValidateInput{
+		{
+			Name:          "Show Command with no args",
+			Input:         []string{},
+			ExpectedValid: true,
+			ConfigHolder: framework.ConfigHolder{
+				ConfigFilePath: "",
+				Config:         configWithWorkspace,
+			},
+		},
 		{
 			Name:          "Show Command with incorrect args",
 			Input:         []string{""},