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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
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