Setting up postgres on ubuntu, and getting it going on heroku

links: https://help.ubuntu.com/community/PostgreSQL,

sudo apt-get install postgresql
sudo apt-get install postgresql-server-dev-all

#Create a user account for postgresql, and a database with the name of your user account
sudo -u postgres createuser --superuser myUbuntuUsername
sudo -u postgres psql
postgres=# \password myUbuntuUsername
\q
createdb myUbuntuUsername

#Check that your postgres useraccount was setup properly
psql
\du 

Use require

'dm-core'

instead of

require 'datamapper'

http://devcenter.heroku.com/articles/database

Keep test and production gems separate:
http://yehudakatz.com/2010/05/09/the-how-and-why-of-bundler-groups/