IpAsInt

IP address - integer conversion and activerecord support for ip attribute as integer column.

Usage

IP address - integer conversion

require 'ip_as_int'
ip_string = '192.168.0.1'
ip_int = IpAsInt.ip2int(ip_string)    # => 3232235521
ip_string = IpAsInt.int2ip(ip_int) # => "192.168.0.1"

Exceptions on invalid IP address

IpAsInt.ip2int('192.168.0')
# => ArgumentError: Invalid IP: need 4 parts
IpAsInt.ip2int('192.168.0.s')
# => ArgumentError: Invalid IP: illegal format
IpAsInt.ip2int('192.168.0.256')
# => ArgumentError: Invalid IP: integer out of range

ActiveRecord IP address attribute as integer column

class Model < ActiveRecord::Base
  include IpAsInt::IpAddressAttribute
  ip_address :ip # :ip as integer column
  search_methods :ip # to allow squeel to do Model.search(:ip => '192.168.0.1')
end

Attribute methods are defined to let the ip attribute assigned a string, conversion to integer column is done automatically.

m = Model.create(:ip => '192.168.0.1')   # => #<Model id: 1, ip: 3232235521>
m.valid?     # => true
m.reload.ip  # => "192.168.0.1"

a scope to retrieve IP by string is also provided unless scope: false option is given.

Model.create(
  [{ :ip => '192.168.0.1' },
   { :ip => '192.168.0.2' },
   { :ip => '192.168.0.3' }
  ])
# => [#<Model id: 3, ip: 3232235521>, #<Model id: 4, ip: 3232235522>, #<Model id: 5, ip: 3232235523>]
Model.ip('192.168.0.1', '192.168.0.2')
# => [#<Model id: 3, ip: 3232235521>, #<Model id: 4, ip: 3232235522>]

a validation of the ip address is set up unless validation: false option is given

Model.create!(:ip => '192.168.0')
# => ActiveRecord::RecordInvalid: Validation failed: Ip has to be a valid IP address

Further use

In fact, you can also use the IpAsInt::IpAddressAttribute module with active model only.

class Model
  include ActiveModel::Validations
  include ::IpAsInt::IpAddressAttribute
  ip_address :ip
end

The validator can also be used by itself on an IP attribute irrespective of underlying storage (i.e., even if you use a string column)

class Model
  # :ip string column
  validates :ip, :ip_address => { :allow_blank => true }
end

Installation

Add this line to your application's Gemfile:

gem 'ip_as_int'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ip_as_int

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Credits

• http://basic70tech.wordpress.com/2007/04/13/32-bit-ip-address-to-dotted-notation-in-ruby/
• http://norbauer.com/notebooks/code/notes/storing-ip-addresses-as-integers