seeds file which inserts csv data in a specific directory into mongodb

seeds.rb

require 'csv'
require 'mongo'

path = "#{Rails.root}/db/seeds/"
db   = Mongo::Connection.new.db('database_name')

Dir.open(path).each do |f|
  if f.match(/(.*)\.csv$/)
    col = db.collection($1)
    col.remove
    CSV.foreach("#{path}#{$1}.csv", headers: true, header_converters: :symbol) do |row|
      fields = row.fields.map{|item| item.match(/^\d*$/) ? item.to_i : item }
      col.insert(Hash[*[row.headers, fields].transpose.flatten])
    end
  end
end