mongo_mauler_connect_to_db_method_v1.rb

require 'mongo' # must have this to work

def connect_to_db(args={})
  ip   = args[:ip]        || '127.0.0.1'
  port = args[:port].to_s || '27017'

  begin
    client = Mongo::Client.new(["#{ip}:#{port}"])
  rescue Mongo::Auth::Unauthorized, Mongo::Error => e
    puts "Error #{e.class}: #{e.message}"
  end
end

# Example usage:

# Connect to local db with all defaults
connect_to_db

# Connect to db with an IP address
connect_to_db(ip: '127.0.0.1')

# Connect to a db wth an IP address and port
connect_to_db(ip: '127.0.0.1', port: '27107') 
# and port can be passed in as an integer
connect_to_db(ip: '127.0.0.1', port: 27107)