Add default parameters to search homepage

core/views/ui/drilldown.py

@@ -120,7 +120,9 @@ def drilldown_search(request, return_context=False, template=None):
         query_params = request.POST.dict()
     else:
         template_name = "ui/drilldown/drilldown.html"
-        context = {"sizes": sizes, "unique": "results"}
+        params_with_defaults = {}
+        helpers.add_defaults(params_with_defaults)
+        context = {"sizes": sizes, "unique": "results", "params": params_with_defaults}
         return render(request, template_name, context)
 
     tmp_post = request.POST.dict()