diff --git a/app/views/events/_form.html.haml b/app/views/events/_form.html.haml
index 065ad846..698bf265 100644
--- a/app/views/events/_form.html.haml
+++ b/app/views/events/_form.html.haml
@@ -39,8 +39,8 @@
     = f.label Event.human_attribute_name :city
     = f.text_field :city, required: true, size: 70, list: :cities
     %datalist#cities
-      - City.all.each do |city|
-        %option= city.name
+      - City.connection.select_values('select distinct name from cities join events on name=city').each do |name|
+        %option= name
   .field
     = f.label Event.human_attribute_name :related_region
     = f.select :region,