dropdown on search page by initing dropdowns on ajax success

CHANGELOG.txt

@@ -35,6 +35,7 @@ Changelog
  * Fix: Fixed order of URLs in project template so that static / media URLs are not blocked (Nick Smith)
  * Fix: Added verbose_name_plural for form submission model (Janneke Janssen)
  * Fix: Prevent `update_index` failures and incorrect front-end rendering on blank `TableBlock` (Carlo Ascani)
+ * Fix: Dropdown initialisation on the search page after AJAX call (Eric Sherman)
 
 
 2.7.1 (08.01.2020)

CONTRIBUTORS.rst

@@ -427,6 +427,7 @@ Contributors
 * Benedikt Willi
 * Johannes Vogel
 * Sam Costigan
+* Eric Sherman
 
 Translators
 ===========

docs/releases/2.8.rst

@@ -60,6 +60,7 @@ Bug fixes
  * Fixed order of URLs in project template so that static / media URLs are not blocked (Nick Smith)
  * Added verbose_name_plural for form submission model (Janneke Janssen)
  * Prevent ``update_index`` failures and incorrect front-end rendering on blank ``TableBlock`` (Carlo Ascani)
+ * Dropdown initialisation on the search page after AJAX call (Eric Sherman)
 
 
 Upgrade considerations

wagtail/admin/static_src/wagtailadmin/js/core.js

@@ -264,6 +264,7 @@ $(function() {
                         }
                     },
                     complete: function() {
+                        wagtail.ui.initDropDowns();
                         $inputContainer.removeClass(workingClasses);
                     }
                 });
@@ -542,7 +543,7 @@ wagtail = (function(document, window, wagtail) {
     }
 
     $(document).ready(initDropDowns);
-
+    wagtail.ui.initDropDowns = initDropDowns;
     wagtail.ui.DropDownController = DropDownController;
     return wagtail;