Menu in front-page.php

1

Hi,
I am trying to figure out how to add a custom menu in the front-page.php.
I create the menu front_page in the admin, but is not display ?
I need do something eles ?

    if( is_front_page() ) {
        echo 'ssss';
        if (has_nav_menu('front_page')) :
          wp_nav_menu(array('theme_location' => 'front_page', 'menu_class' => 'nav navbar-nav'));
        endif;
    }else {
        if (has_nav_menu('primary_navigation')) :
          wp_nav_menu(array('theme_location' => 'primary_navigation', 'menu_class' => 'nav navbar-nav'));
        endif;
      }
2

Did you register a nav menu and assign a populated menu to it?

3

I did:

function register_my_menu() {
register_nav_menu(‘front_page’,__( ‘front_page’ ));
}
add_action( ‘init’, ‘register_my_menu’ );

But I want the same menu than

Roots_Nav_Walker()

EDIT:
I forgot to check the theme location, works now