How to use long id in Rails applications?

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Credits to http://moeffju.net/blog/using-bigint-columns-in-rails-migrations

class CreateDemo < ActiveRecord::Migration
  def self.up
    create_table :demo, :id => false do |t|
      t.integer :id, :limit => 8
    end
  end
end
  • See the option :id => false which disables the automatic creation of the id field
  • The t.integer :id, :limit => 8 line will produce a 64 bit integer field

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