merb-gen app test
cd test/
nano -w config/dependencies.rb
#change
#dm_gems_version   = "0.10"
#do_gems_version   = "0.10"

merb-gen resource Heffalump id:serial,created_at:datetime

merb -i

h = Heffalump.new
h.save

-> query: (0.209684) INSERT INTO "heffalumps" ("created_at") VALUES (NULL)