ruby-on-rails - ActiveRecord 迁移：Postgres：字符串作为主键

Question

我尝试了几种方法将字符串添加为rails中的主键。到目前为止，这是我尝试过的。有人可以帮助找到解决方案。

class CreateClients < ActiveRecord::Migration
  def change
    create_table :clients, primary_key: :client_id, id: false do |t|
      t.string :client_id
      t.string :client_secret
      t.integer :app_id
    end
    add_index :clients, [:app_id, :client_id]
  end
end

--

class CreateClients < ActiveRecord::Migration
  def change
    create_table :clients, id: false do |t|
      t.string :client_id, primary: true
      t.string :client_secret
      t.integer :app_id
    end
    add_index :clients, [:app_id, :client_id]
  end
end

--

class CreateClients < ActiveRecord::Migration
  def change
    create_table :clients, id: false do |t|
      t.string :client_id, primary_key: true
      t.string :client_secret
      t.integer :app_id
    end
    add_index :clients, [:app_id, :client_id]
  end
end