ruby-datamapper

I have the following code: require 'sinatra' require 'datamapper' DataMapper.setup :default, "postgres://localhost/mydb" However, when I try and run it, I get: LoadError: no such file to load -- dm-postgres-adapter /Library/Ruby/Site/1.8/rubygems/custom_require.rb:53:in `gem_original_require' /Library/Ruby/Site/1.8/rubygems/custom_require.rb:53:in `require' /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/adapters.rb:163:in `load_adapter' /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/adapters.rb:133:in `adapter_class' /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/adapters

Can anyone give me some pointers on how I could deploy my rails app to GAE? I've been reading about it, but it seems to be a fairly complicated task. I tried with the google-appengine gem, but its not a piece of cake either. Has there been any progress with the DataMapper adapter or will I need to make changes to my models? I was hoping to see a full-detail tutorial about it, but those that I found were somewhat out-of-date. Deploying Rails on Google's App Engine has become a lot easier than it used to be. There are a couple of caveats you should be aware of: App Engine only supports the