default date/time doesn't work properly in postgres about do

[dkubb]

@tkellen: a default like this will be evaluated when the class is, so your're essentially hard-coding the date/time in your model. What you want to use is a proc: :default => proc { DateTime.now }. This will be evaluated each time an object is created.

See the section titled "Setting default values" in http://datamapper.org/docs/properties.html for more information.