Make last_published_at filterable

CHANGELOG.txt

@@ -12,6 +12,7 @@ Changelog
  * Breadcrumb navigation now uses globe icon to indicate tree root, rather than home icon (Matt Westcott)
  * Updated React to 15.6.2 due to relicensing (Janneke Janssen)
  * User search in the Wagtail admin UI now works across multiple fields (Will Giddens)
+ * `Page.last_published_at` is now a filterable field for search (Mikalai Radchuk)
  * Fix: "Open Link in New Tab" on a right arrow in page explorer should open page list (Emily Horsman)
  * Fix: Using `order_by_relevance=False` when searching with PostgreSQL now works (Mitchel Cabuloy)
  * Fix: Inline panel first and last sorting arrows correctly hidden in non-default tabs (Matt Westcott)

docs/releases/1.13.rst

@@ -22,6 +22,7 @@ Other features
  * Breadcrumb navigation now uses globe icon to indicate tree root, rather than home icon (Matt Westcott)
  * Wagtail now uses React 15.6.2 and above, released under the MIT license (Janneke Janssen)
  * User search in the Wagtail admin UI now works across multiple fields (Will Giddens)
+ * ``Page.last_published_at`` is now a filterable field for search (Mikalai Radchuk)
 
 Bug fixes
 ~~~~~~~~~

wagtail/wagtailcore/models.py

@@ -358,6 +358,7 @@ class Page(six.with_metaclass(PageBase, AbstractPage, index.Indexed, Clusterable
         index.FilterField('locked'),
         index.FilterField('show_in_menus'),
         index.FilterField('first_published_at'),
+        index.FilterField('last_published_at'),
         index.FilterField('latest_revision_created_at'),
     ]