Hello,

   I've added support for the interactive Ruby console (irb) to the
open world database gem [1]. Use

     irb -r worlddb/console

   and you're ready to go.

  Try

    en = Country.find_by_key! 'en'
    en.regions
    en.cities

  or

    euro = Tag.find_by_key! 'euro'
    euro.countries

  and so on.

  More info -> https://github.com/geraldb/world.db
  Live demo -> http://worlddb.herokuapp.com/tags

  Cheers.

[1] https://github.com/geraldb/world.db/blob/master/script/lib/worlddb/console.rb