rake db:migrate using MonetDB

gistfile1.rb

#Migration files:

class CreateCategory < ActiveRecord::Migration
  def self.up
    create_table :categories do |t|
      t.string :name

      t.timestamps
    end
  end
  def self.down
    drop_table :categories
  end
end

class CreateRecipe < ActiveRecord::Migration
  def self.up
    create_table :recipes do |t|
      t.string  :name
      t.string  :slug
      t.integer :rating
      t.references :category
      t.integer :prep_time
      t.integer :cook_time
      t.integer :servings
      t.string :steps

      t.timestamps
    end
  end

  def self.down
    drop_table :recipes
  end
end


Output:

** Invoke db:migrate (first_time)
** Invoke db:configure_connection (first_time)
** Invoke db:configuration (first_time)
** Invoke db:environment (first_time)
** Execute db:environment
** Execute db:configuration
** Execute db:configure_connection
** Execute db:migrate
I, [2011-07-27T00:12:01.004411 #6429]  INFO -- : Migrating to CreateCategory (0)
==  CreateCategory: migrating =================================================
-- create_table(:categories)
   -> 0.0534s
==  CreateCategory: migrated (0.0537s) ========================================

rake aborted!
An error has occurred, all later migrations canceled:

undefined method `relation' for nil:NilClass
/usr/lib/ruby/gems/1.8/gems/arel-2.0.10/lib/arel/insert_manager.rb:22:in `insert'
/usr/lib/ruby/gems/1.8/gems/arel-2.0.10/lib/arel/crud.rb:26:in `insert'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:598:in `record_version_state_after_migrating'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:540:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:615:in `call'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:615:in `ddl_transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:538:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:525:in `each'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:525:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:435:in `up'
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/migration.rb:417:in `migrate'