Corrected migration, to populate the new tags table

db/migrate/20161210154558_populate_tags.rb

@@ -5,16 +5,14 @@ class PopulateTags < ActiveRecord::Migration
       event = Event.find_by id: result[0]
       event.tag_list = result[1] + ' helo world'
       event.save
-      say event.id
-      say event.tag_list
     end
 
-    change_column :events, :tags, :text, null: true
-    change_column :orgas, :tags, :text, null: true
+    change_column_null :events, :tags, true
+    change_column_null :orgas, :tags, true
   end
 
   def self.down
-    change_column :events, :tags, :text, null: false
-    change_column :orgas, :tags, :text, null: false
+    change_column_null :events, :tags, false
+    change_column_null :orgas, :tags, false
   end
 end