db/migrate/20120205111326_change_users_login_limit.rb


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class ChangeUsersLoginLimit < ActiveRecord::Migration
  def self.up
    change_column :users, :login, :string, :limit => nil, :default => '', :null => false
  end

  def self.down
    change_column :users, :login, :string, :limit => 30, :default => '', :null => false
  end
end