How to list all available locale keys in Rails?

Question

My locale file has become unwieldy with a bunch of nested keys. Is there a way to get a list of all available locale keys, or all locale keys from a single locale file?

For eg.

en:
  car:
     honda:
          civic:
               name: 'Civic'
               description: 'Entry Level Sedan'
     ferrari:
          la_ferrari:
               name: 'La Ferrari'
               description: 'Supercar'

This locale should return the list of keys, which in this case is

['en.car.honda.civic.name', 'en.car.honda.civic.description',
'en.ferrari.la_ferrari.name', 'en.car.ferrari.la_ferrari.name.description']

Is there a Rails (I18n) helper to do this? The other way is to iterate over the parsed YAML.

Answer 1

This is a script I've written when I had to deal with this. Working great for me.

#! /usr/bin/env ruby

require 'yaml'

filename = if ARGV.length == 1
  ARGV[0]
elsif ARGV.length == 0
  "/path/to/project/config/locales/new.yml"
end

unless filename
  puts "Usage: flat_print.rb filename"
  exit(1)
end

hash = YAML.load_file(filename)
hash = hash[hash.keys.first]

def recurse(obj, current_path = [], &block)
  if obj.is_a?(String)
    path = current_path.join('.')
    yield [path, obj]
  elsif obj.is_a?(Hash)
    obj.each do |k, v|
      recurse(v, current_path + [k], &block)
    end
  end
end

recurse(hash) do |path, value|
  puts path
end