[rails] DBModel Gem

http://wiki.rubyonrails.com/rails/show/DBModelGem

The dbmodel gem accepts XML data model files from DBDesigner 4 , calls generate model or generate scaffold for tables with relationships, and inserts relationships (“has_many :beers”) into appropriate Model files. Insertion of relationships into Model files is non-destructive ― existing files aren’t removed and current code is kept.

DBDesigner4との連携ができるのは結構いいかも。