Class: Acfs::Resource::Attributes::UUID

Inherits:
Base
  • Object
show all
Defined in:
lib/acfs/resource/attributes/uuid.rb

Overview

UUID attribute type. Use it in your model as an attribute type:

Examples:

class User < Acfs::Resource
  attribute :id, :uuid
end

Constant Summary collapse

UUID_REGEXP = 
/[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/i.freeze

Instance Attribute Summary

Attributes inherited from Base

#default

Instance Method Summary collapse

Methods inherited from Base

#cast, #default_value, #initialize

Constructor Details

This class inherits a constructor from Acfs::Resource::Attributes::Base

Instance Method Details

#cast_value(value) ⇒ String

Check if given object looks like a UUID, eg:

`450b7a40-94ad-11e3-baa8-0800200c9a66`

Valid UUIDs are 16 byte numbers represented as

a hexadecimal string in five sub-groups seperated
by a dash. Each group has to consist of a fixed
number of hexadecimal digits:
 | Group | Digits |
 | -----:|:------ |
 |     1 | 8      |
 |     2 | 4      |
 |     3 | 4      |
 |     4 | 4      |
 |     5 | 12     |

Parameters:

  • value (Object) —

    Object to cast.

Returns:

  • (String) —

    Casted object as UUID.



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# File 'lib/acfs/resource/attributes/uuid.rb', line 35

def cast_value(value)
  if value.blank?
    nil
  elsif UUID_REGEXP.match?(value.to_s)
    value
  else
    raise TypeError.new "Invalid UUID: `#{value}'"
  end
end