Country seed data using data from the 'countries' gem. Table columns: - name - continent - alpha2_code - currency_code - calling_code Adapt for your own use!

seeds.rb

# Countries
#   `alpha2_code` has unique constraint
countries_seed_file = File.join(Rails.root, 'db', 'seeds', 'countries.yml')
countries = YAML.load_file(countries_seed_file)

countries.each do |country|
  country = country[-1]
  data = {
    name: country['name'],
    continent: country['continent'],
    alpha2_code: country['alpha2'],
    currency_code: country['currency'] || "",
    calling_code: country['country_code'].to_i
  }
  begin
    Country.create(data)
  rescue
    next
  end
end