class Rails::Generators::GeneratedAttribute

def default
  @default ||= case type
    when :integer                     then 1
    when :float                       then 1.5
    when :decimal                     then "9.99"
    when :datetime, :timestamp, :time then Time.now.to_s(:db)
    when :date                        then Date.today.to_s(:db)
    when :string                      then "MyString"
    when :text                        then "MyText"
    when :boolean                     then false
    when :references, :belongs_to     then nil
    else
      ""
  end
end