Search results are chronological

Also moved to search_view_factory because apparently it's thread-safe and I think Apache runs multiple threads.

main/search_indexes.py

@@ -3,6 +3,7 @@ from .models import Thought
 
 class ThoughtIndex(indexes.SearchIndex, indexes.Indexable):
     text = indexes.CharField(document=True, use_template=True, template_name="search/indexes/main/thought_text.txt")
+    posted = indexes.DateTimeField(model_attr="posted")
 
     def get_model(self):
         return Thought

whispermaphone/urls.py

@@ -5,7 +5,8 @@ from main import views
 from main.feed import MainFeed
 from whispermaphone import settings
 
-from haystack.views import SearchView
+from haystack.views import SearchView, search_view_factory
+from haystack.query import SearchQuerySet
 from haystack.forms import SearchForm
 
 urlpatterns = [
@@ -14,5 +15,9 @@ urlpatterns = [
     path("login", views.login, name="login"),
     path("post", views.post, name="post"),
     path("feed", MainFeed()),
-    path("search", SearchView(form_class=SearchForm), name="thoughts_search")
+    path("search", search_view_factory(
+        view_class=SearchView,
+        form_class=SearchForm,
+        searchqueryset=SearchQuerySet().order_by("-posted")
+    ), name="thoughts_search")
 ] + (static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) if settings.DEBUG else [])