Initializing a lookup table in Rails

You're writing a migration script for a Rails application which will create a "Priorities" table with columns for name and position. What if you want to initialize it with well known values? Here's the Ruby way:

create_table :priorities do |t|
  t.column :name, :string
  t.column :position, :integer
end

say_with_time "Initializing priorities..." do
  ["low", "normal", "high"].each_with_index do |elem, i|
    Priority.create(:name => elem, :position => 1 + i)
  end
end