--- /dev/null
+class ChangeAttachmentsContainerDefaults < ActiveRecord::Migration
+ def self.up
+ change_column :attachments, :container_id, :integer, :default => nil, :null => true
+ change_column :attachments, :container_type, :string, :limit => 30, :default => nil, :null => true
+ Attachment.update_all "container_id = NULL", "container_id = 0"
+ Attachment.update_all "container_type = NULL", "container_type = ''"
+ end
+
+ def self.down
+ change_column :attachments, :container_id, :integer, :default => 0, :null => false
+ change_column :attachments, :container_type, :string, :limit => 30, :default => "", :null => false
+ end
+end