core: improve search index with 'autocomplete'

core/search_indexes.py

@@ -31,6 +31,7 @@ from core.models import User
 
 class UserIndex(indexes.SearchIndex, indexes.Indexable):
     text = indexes.CharField(document=True, use_template=True)
+    auto = indexes.EdgeNgramField(use_template=True)
 
     def get_model(self):
         return User

core/templates/search/indexes/core/user_auto.txt

+{{ object.first_name }}
+{{ object.last_name }}
+{{ object.nick_name }}

core/views/site.py

@@ -71,7 +71,7 @@ def notification(request, notif_id):
 
 
 def search_user(query, as_json=False):
-    res = SearchQuerySet().models(User).filter_or(text__contains=query)[:20]
+    res = SearchQuerySet().models(User).autocomplete(auto=query)[:20]
     return [r.object for r in res]