Primary Key Type other than INT?

[Josti]

Hello,

I started to use Rails recently and at the moment I am focusing Mgrations.
Is it possible to change the type of the primary key? Changing the name is fairly easy. I have data that are referencend by a char field that has unique content.

That's what my first migration looks like.

def self.up
    create_table(:pages, :primary_key => :id) do |t|
      t.column :id, :string
      t.column :name, :string
      t.column :content, :string
end

Somebody got a hint?