Module: MmUsesUuid

Extended by:
ActiveSupport::Concern
Defined in:
lib/mm_uses_uuid/version.rb,
lib/mm_uses_uuid.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

VERSION = 
"0.0.15"

Instance Method Summary collapse

Instance Method Details

#find_new_uuid(options = {}) ⇒ Object 



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# File 'lib/mm_uses_uuid.rb', line 127

def find_new_uuid(options = {})
  
  options = {force_safe: false}.merge(options)
    
  if not options[:ensure_unique_in]
    @_id, variant = make_uuid
    #puts "assuming #{variant} UUID #{@_id} is available"
    return
  else
    find_new_uuid_safely(options[:ensure_unique_in])
  end

end

#find_new_uuid_safely(coll) ⇒ Object 



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# File 'lib/mm_uses_uuid.rb', line 141

def find_new_uuid_safely(coll)

  @_id = nil
  begin
    trial_id, variant = make_uuid
    #puts "CHECKING #{coll} collection for availability of #{variant} UUID: #{trial_id}"
    if coll.where(:_id => trial_id).fields(:_id).first.nil?
      @_id = trial_id
    end
  end while @_id.nil?

end

#id_to_s ⇒ Object 



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# File 'lib/mm_uses_uuid.rb', line 173

def id_to_s
  copy = self.clone
  copy.instance_variable_set '@_id',  @_id.to_s
  copy
end

#id_to_s! ⇒ Object 



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# File 'lib/mm_uses_uuid.rb', line 168

def id_to_s!
  @_id = @_id.to_s
  self
end

#make_uuid ⇒ Object 



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# File 'lib/mm_uses_uuid.rb', line 154

def make_uuid
  uuid = SecureRandom.uuid.gsub!('-', '')
  if self.class.single_collection_inherited?
    lookup_class = self.class.collection_name.singularize.camelize.constantize
  else
    lookup_class = self.class
  end
  if replacement_lsn = UuidModel.class_lsn_lookup[lookup_class]
    uuid[-1] = replacement_lsn.to_s(16)
  end
  bson_encoded_uuid = BSON::Binary.new(uuid, BSON::Binary::SUBTYPE_UUID)
  return bson_encoded_uuid, 'random'
end