allow usage of ensure_unique with auto-generated strings outside record create cycle

Rakefile

@@ -2,11 +2,11 @@ require 'rubygems'
 require 'rake'
 require 'echoe'
 
-Echoe.new('uniquify', '0.1.0') do |p|
+Echoe.new('uniquify', '0.2.0') do |p|
   p.description    = "Generate a unique token with Active Record."
   p.url            = "http://github.com/ryanb/uniquify"
-  p.author         = "Ryan Bates"
-  p.email          = "ryan@railscasts.com"
+  p.author         = ["Ryan Bates", "Peter Brindisi"]
+  p.email          = ["ryan@railscasts.com", "npj@frestyl.com"]
   p.ignore_pattern = ["tmp/*", "script/*"]
   p.development_dependencies = []
 end

lib/uniquify.rb

@@ -3,30 +3,37 @@ def self.included(base)
     base.extend ClassMethods
   end
 
-  def ensure_unique(name)
-    begin
-      self[name] = yield
-    end while self.class.exists?(name => self[name])
-  end
-
   module ClassMethods
 
     def uniquify(*args, &block)
       options = { :length => 8, :chars => ('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a }
       options.merge!(args.pop) if args.last.kind_of? Hash
+
+      class_inheritable_reader(:uniquify_options)
+      write_inheritable_attribute(:uniquify_options, options)
+
       args.each do |name|
         before_validation :on => :create do |record|
           if block
             record.ensure_unique(name, &block)
           else
-            record.ensure_unique(name) do
-              Array.new(options[:length]) { options[:chars].to_a[rand(options[:chars].to_a.size)] }.join
-            end
+            record.ensure_unique(name)
           end
         end
       end
     end
-
+
+    def generate_unique
+      Array.new(uniquify_options[:length]) { uniquify_options[:chars].to_a[rand(uniquify_options[:chars].to_a.size)] }.join
+    end
+  end
+
+  def ensure_unique(name, &block)
+    begin
+      self[name] = (block ? block.call : self.class.generate_unique)
+    end while self.class.exists?(name => self[name])
+
+    self[name]
   end
 end
 

uniquify.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = %q{uniquify}
-  s.version = "0.1.0"
+  s.version = "0.2.0"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 1.2") if s.respond_to? :required_rubygems_version=
   s.authors = ["Ryan Bates"]