In order to port many of the snippets over from the TextMate bundle I wrote a script that automates the process. There is a Python script that does something very similar. The writing of my script was more of just a code kata for me, so take a look at both. One may be more suitable for your needs.

$ rake db:structure:dump

in a rails app when using Oracle as your database, then you have probably been slightly disappointed. The same rake task for MySQL and Postgres dumps everything you need to recreate the database. The task for Oracle only dumps SQL for the table creation (no constraints), and for the sequences. The active_record_oracle_extensions plug now supports dumping sql for the following:

• primary keys
• indexes
• foreign keys
• synonyms

Installing into a Rails app

$ script/plugin install git://github.com/eyestreet/active_record_oracle_extensions.git

Adding Foreign Keys In a Migration

The example below shows a snippet from a migration that adds a foreign key.

def self.up
    create_table :assets, :force => true do |t|
      t.integer :media_record_id
      t.string  :media_file_name
      t.string  :media_content_type
      t.integer :media_file_size
      t.datetime :media_updated_at
      t.timestamps
    end
    add_foreign_key_constraint :assets, :media_record_id, 
                                        :media_records, :id
 end

Adding a Synonym in Migration

The example below shows the creation of a synonym named events for other_user.events. The force option adds “or replace” to the sql that generates the synonym. It is assumed that the user under which your are creating the synonym already has the needed grants to allow the creation of the synonym on other_user.

add_synonym :events, :other_user, :events, :force => true

Disabling Constraints During Fixture Loading

If you are using sys or system as your user for your rails application, then do not use this plugin, or use it at your own risk. During fixture loading, this plugin disables constraints for the user that has established the connection to oracle, and then re-enables the constraints after the load.