db/migrate/20100901130900_create_account_group_memberships.rb
class CreateAccountGroupMemberships < ActiveRecord::Migration
def self.up
create_table :account_group_memberships do |t|
t.integer :account_id
t.integer :group_id
end
add_index :account_group_memberships, 'account_id', :name => 'idx_account_id'
add_index :account_group_memberships, 'group_id', :name => 'idx_group_id'
end
def self.down
drop_table :account_group_memberships
end
end