Ability to add extra field to menu_item from page field

[andrewebdev]

What would be the best way to add a extra property to the some menu items? I had a look at the hooks, but there is no clear hook to do this.

My issue is that I have a property on some of my pages which should change the menu item CSS. These can change between pages. I can grab the page_id from the menu_item, do a lookup for that property on the page from there, but this will cause extra database queries that I'd prefer to avoid.

Correction: I cannot even look up page_id in the template using a filter because even this is not passed to the context.

I tried the following:

@hooks.register('menus_modify_base_page_queryset')
def menu_item_highlights(
        queryset,
        request,
        menu_instance,
        original_menu_tag,
        current_site,
        **kwargs):

    queryset = queryset.annotate(
        highlight_color=F('genericpage__highlight_color'))
    return queryset

But of course this doesn't work because, when the menu_items are primed, this value is not added. I just want a way to add highlight_color to the menu_item context.

[ababic]

@andrewebdev the page for a menu item should always be accessible from the template.

For top-level menu items, the the menu item will be a MenuItem instance, with the page available via the link_page field, so menu_item.link_page.highlight_color should work.

For menu items generated from pages, the menu items are actually specific page instances with attributes added, so menu_item.highlight_color should work.