Add PageQuerySet.ever_live() and PageQueryset.never_live() filters

docs/reference/pages/queryset_reference.rst

@@ -50,6 +50,22 @@ Reference
 
             unpublished_pages = Page.objects.not_live()
 
+    .. automethod:: ever_live
+
+        Example:
+
+        .. code-block:: python
+
+            published_or_once_published_pages = Page.objects.ever_live()
+
+    .. automethod:: never_live
+
+        Example:
+
+        .. code-block:: python
+
+            never_published_pages = Page.objects.never_live()
+
     .. automethod:: in_menu
 
         Example:

wagtail/core/query.py

@@ -164,6 +164,23 @@ class PageQuerySet(SearchableQuerySetMixin, TreeQuerySet):
         """
         return self.exclude(self.live_q())
 
+    def ever_live_q(self):
+        return Q(Q(last_published_at__isnull=False) | Q(live=True))
+
+    def ever_live(self):
+        """
+        This filters the QuerySet to only contain pages that have at some
+        point in their history been published.
+        """
+        return self.filter(self.ever_live_q())
+
+    def never_live(self):
+        """
+        This filters the QuerySet to only contain pages that have never
+        been published before (have always been drafts).
+        """
+        return self.exclude(self.ever_live_q())
+
     def in_menu_q(self):
         return Q(show_in_menus=True)