db/development_structure.sql missing constraints

I have lots of constraints in my migrations, for example:

cat db/migrate/002_create_users.rb |grep -i constraint

execute "alter table users add constraint pk_users primary key (user_id)"

I am wanting those constraints to be present in my test db when I run my tests. Presently they are not there.

rm db/development_structure.sql

cat config/environment.rb | grep schema_format

config.active_record.schema_format = :sql

rake db:migrate VERSION=0

rake db:migrate

rake

cat db/development_structure.sql | grep -i constraint

Nothing.

Here is my current setup:

cat config/environment.rb | grep 2.2.2

RAILS_GEM_VERSION = '2.2.2' unless defined? RAILS_GEM_VERSION

ruby -v

ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]

gem list --local | grep oracle

activerecord-oracle_enhanced-adapter (1.1.9)

gem list --local| grep rails

rails (2.2.2)