If you used MySQL FULLTEXT indexes and just upgraded to Rails 1.1, watch
out for this one. Rails 1.1 now defaults to Ruby as your schema format.
So instead of development-structure.sql, Rake will use schema.rb.
That’s portable and good stuff overall but there is a slight
compatibility issue. Ruby schema doesn’t know how to do FULLTEXT index
syntax for MySQL.
To work around it, you can either write migration and execute SQL, or
config.active_record.schema_format = :sql
in your environment.rb to stick with SQL schema format. Don’t put
anything in schema.rb manually, it will get overwritten.
See [http://dev.rubyonrails.org/ticket/4474] for bug tracking reference.