Fixed AREL visitor issue

lib/classy_enum.rb

@@ -1,3 +1,4 @@
+require "classy_enum/active_record"
 require "classy_enum/base"
 require "classy_enum/class_methods"
 require "classy_enum/instance_methods"

lib/classy_enum/active_record.rb

@@ -0,0 +1,15 @@
+module ActiveRecord #nodoc
+  class PredicateBuilder
+    def build_from_hash_with_classy_enum(attributes, default_table)
+
+      # Convert classy enum values to strings
+      attributes.map do |column, value|
+        attributes[column] = value.to_s if value.is_a? ClassyEnum::Base
+      end
+
+      build_from_hash_without_classy_enum(attributes, default_table)
+    end
+
+    alias_method_chain :build_from_hash, :classy_enum
+  end
+end

spec/active_record_spec.rb

@@ -0,0 +1,23 @@
+require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
+
+class ActiveDog < ActiveRecord::Base
+  classy_enum_attr :breed
+
+  # validates :name,
+  #   :presence => true,
+  #   :uniqueness => { :scope => [:breed] }
+  validates_uniqueness_of :name, :scope => [:breed]
+
+end
+
+describe ActiveDog do
+  before do
+    ActiveDog.create!(:name => 'Sebastian', :breed => :golden_retriever)
+    ActiveDog.create!(:name => 'Sirius', :breed => :husky)
+  end
+
+  it 'should allow validation with classy enum scope' do
+    dog = ActiveDog.new(:name => 'Sirius', :breed => :golden_retriever)
+    dog.should be_valid
+  end
+end

spec/spec_helper.rb

@@ -29,14 +29,20 @@
   create_table :allow_blank_breed_dogs, :force => true do |t|
     t.string :breed
   end
-  
+
   create_table :allow_nil_breed_dogs, :force => true do |t|
     t.string :breed
   end
+
+  create_table :active_dogs, :force => true do |t|
+    t.string :breed
+    t.string :name
+    t.integer :age
+  end
 end
 
 class Breed < ClassyEnum::Base
-  enum_classes :golden_retriever, :snoop
+  enum_classes :golden_retriever, :snoop, :husky
 end
 
 class Dog < ActiveRecord::Base