dyld: NSLinkModule() error
dyld: Symbol not found: _PQnparams
  Referenced from: /usr/local/pkgs/ruby-1.8.6/lib/ruby/site_ruby/1.8/i686-darwin8.10.3/postgres_c.bundle
  Expected in: flat namespace

Trace/BPT trap

Generated from:

require "rubygems"
require "data_mapper"
require "data_objects"

DataMapper::Database.setup({
  :adapter  => 'postgresql',
  :host     => 'localhost',
  :username => 'foo',
  :password => '',
  :database => 'test'
})

class Post < DataMapper::Base
  property :title, :string
  property :body, :text
  property :created_at, :datetime
end