Module: SetsUUID::ClassMethods

Defined in:
lib/sets_uuid.rb

Instance Method Summary collapse

Instance Method Details

#sets_uuid(callback_name, attributes_and_formats_hash) ⇒ Object

Call it on ActiveRecord class definition body:

sets_uuid :before_create, :attribute_name => :uuid_format.

uuid_format is one of :compact, :default.

Raises:

  • (ArgumentError) 


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# File 'lib/sets_uuid.rb', line 12

def sets_uuid(callback_name, attributes_and_formats_hash)
  require 'simple_uuid'

  raise ArgumentError, "attributes_and_formats_hash does not act as a Hash!" unless attributes_and_formats_hash.respond_to?(:each)

  attributes_and_formats_hash.each do |attribute, format|

    meth = "__generate_uuid_for_#{ attribute }".intern

    if format == :compact
      implementation = proc { write_attribute(attribute, SimpleUUID::UUID.new.to_guid.gsub(/-/, "")) }
    else
      implementation = proc { write_attribute(attribute, SimpleUUID::UUID.new.to_guid) }
    end

    include(Module.new { define_method(meth, &implementation) })

    send(callback_name, meth)
  end
end