Ensure event.draft_saved is 'false' instead of 'nil'

Fixes railsbridge#366

db/migrate/20150813035954_ensure_draft_saved_is_false_instead_of_nil.rb

@@ -0,0 +1,14 @@
+class EnsureDraftSavedIsFalseInsteadOfNil < ActiveRecord::Migration
+  class Event < ActiveRecord::Base; end
+
+  def up
+    change_column_default :events, :draft_saved, false
+    Event.find_each do |e|
+      e.update_attribute(:draft_saved, false) if e.draft_saved.nil?
+    end
+  end
+
+  def down
+    change_column_default :events, :draft_saved, nil
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150726194812) do
+ActiveRecord::Schema.define(version: 20150813035954) do
 
   create_table "authentications", force: :cascade do |t|
     t.integer  "user_id"
@@ -110,7 +110,7 @@
     t.boolean  "has_childcare",                  default: true
     t.boolean  "restrict_operating_systems",     default: false
     t.string   "allowed_operating_system_ids"
-    t.boolean  "draft_saved"
+    t.boolean  "draft_saved",                    default: false
     t.integer  "volunteer_rsvp_limit"
     t.integer  "volunteer_waitlist_rsvps_count", default: 0
     t.string   "target_audience"