how to set django admin ordering field customely?

Question

admin.py

class MovieItemInline(AjaxSelectAdminTabularInline):
    model = MovieItem
    ordering = ['-date']


class MovielistAdmin(ModelAdminBase, AjaxSelectAdmin):
    inlines = (MovieItemInline, )


admin.site.register(Movielist, MovielistAdmin)

models.py

class MovieItem(Model):
    title = CharField(default="")
    view_number = IntegerField(default=0)
    price = IntegerField(default=0)
    date = IntegerField(default=0)


class Movielist(Model):
    title = CharField(default="")
    display_order = CharField(default="date")

MovieItemInline is MovielistAdmin's inline attribute, I wanna sort MovieItem, for example, if Movielist.display_order equals "date", then sort MovieItem by MovieItem.date. if Movielist.display_order equals "price", then sort MovieItem by MovieItem.price. if Movielist.display_order equals "view_number", then sort MovieItem by MovieItem.view_number. What should I do? Is django support?

Answer 1

You can override the get_ordering method inside MovieItemInline class.

from django.urls import resolve

def get_ordering(self, request):
    # get Movielist object instance from request
    object_id = resolve(request.path).args[0]
    
    # retrieve Movielist object 
    movie_list = MovieList.objects.get(id=object_id)

    # modify ordering based on movie_list display_order value
    if movie_list.display_order == 'date':
        return ['-date']
    elif movie_list.display_order == 'price':
        return ['-price']
    elif movie_list.display_order == 'view_number':
        return ['-view_number']

    # fallback value if non of the above match
    return ['-title']