Prevent users from creating 'index' pages?

Apologies if this has already been answered, but I couldn’t find any related issue.

While working through the Wagtail tutorial, we create a BlogIndexPage, and subsequently Blog posts. Once the Blog index is created, there is no need to create another BlogIndexPage. How can I restrict users from creating secondary index pages? E.g. is it possible to keep the BlogIndexPage from showing up as an option when creating a new page?

[sir-sigurd]

You could also try something like this

from django.utils.decorators import classproperty  # not sure if this is public API

class BlogIndexPage(Page):
    @classproperty
    def is_creatable(cls):
        return not cls.objects.exists()

[zerolab]

The ‘unofficial way’, as covered by tests is to override can_create_at and augment the parent check with a not cls.objects.exists()

https://github.com/wagtail/wagtail/blob/master/wagtail/tests/testapp/models.py#L862

Will work on adding max_count and updating the documentation to settle on one solution.