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