How to use long id in Rails applications?

Question

How can I change the (default) type for ActiveRecord\'s IDs? int is not long enough, I would prefer long. I was surprised that there is no :long for the migrations - does on

Answer 1

Borrowing from other solutions, adjusted for what worked for me recently.

Add to a file in config/initializers. It declares a new column type (adapted from chookeat's suggestion).

ActiveRecord::ConnectionAdapters::Mysql2Adapter::NATIVE_DATABASE_TYPES[:long_primary_key] = "BIGINT(20) DEFAULT NULL auto_increment PRIMARY KEY"

Migrations that use a long id are as such:

    create_table :notification_logs, :id => false do |t|

      t.column :id, :long_primary_key
      # ...
    end