Wagtail: Change list_display for wagtailmenus

Question

I'm using the wagtailmenus library with some custom models as described here. Nothing major, it just adds a language field:

class TranslatableFlatMenu(AbstractFlatMenu):
    language = models.CharField(choices=TRANSLATION_CHOICES, help_text='For what language the menu should be used', max_length=13)

    content_panels = (
        MultiFieldPanel(
            heading=_("Menu Details"),
            children=(
                FieldPanel("title"),
                FieldPanel("site"),
                FieldPanel("handle"),
                FieldPanel("heading"),
                FieldPanel("language"),
            )
        ),
        FlatMenuItemsInlinePanel(),
    )


class TranslatableFlatMenuItem(AbstractFlatMenuItem):
    menu = ParentalKey(
        TranslatableFlatMenu,
        on_delete=models.CASCADE,
        related_name=settings.FLAT_MENU_ITEMS_RELATED_NAME,
    )

This works great, however I would like to display the field here:

Now for regular models I can use ModelAdmin and pass list_display, but wagtailmenus seems to already register the menus itself. Is it possible to still change the list_display property somehow so I can display the language in the list?

Answer 1

I'm not to well-versed on wagtailmenus, but it thinks WAGTAILMENUS_FLAT_MENUS_MODELADMIN_CLASS is the setting you're looking for.

To change the fields in list_display, you would have to subclass wagtailmenus; FlatMenuAdmin and override its get_list_display function:

class TranslatableFlatMenuAdmin(FlatMenuAdmin):
    def get_list_display(self, request):
        if self.is_multisite_listing(request):
            return ('title', 'language', 'handle_formatted', 'site', 'items')
        return ('title', 'language', 'handle_formatted', 'items')

then in your settings.py add something like:

WAGTAILMENUS_FLAT_MENUS_MODELADMIN_CLASS = "project.app.admin.TranslatableFlatMenuAdmin"