update avatar urls for twitter to https in migration

refs #5194

Change-Id: Id6aace4a0e6a1ebc25fd20eb42ee187d96fdf83d
Reviewed-on: https://gerrit.instructure.com/6068
Reviewed-by: Brian Palmer <brianp@instructure.com>
Tested-by: Hudson <hudson@instructure.com>

db/migrate/20111010173231_update_twitter_urls_for_https.rb

@@ -0,0 +1,14 @@
+class UpdateTwitterUrlsForHttps < ActiveRecord::Migration
+  def self.up
+    while true
+      users = User.find(:all, :conditions => "avatar_image_source='twitter' AND avatar_image_url NOT LIKE 'https%'", :limit => 500).each do |u|
+        u.avatar_image = { 'type' => 'twitter'  }
+        u.save!
+      end
+      break if users.empty?
+    end
+  end
+
+  def self.down
+  end
+end