diff --git a/lib/mongo/model/conversion.rb b/lib/mongo/model/conversion.rb
index 9480740..d2cb852 100644
--- a/lib/mongo/model/conversion.rb
+++ b/lib/mongo/model/conversion.rb
@@ -28,7 +28,7 @@ def to_rson options = {}
       profile_options = self.class.profiles[profile] || raise("profile :#{profile} not defined for #{self.class}!")
       to_rson profile_options.merge(_profile: profile)
     else
-      options.validate_options! :only, :except, :methods, :_profile
+      options.validate_options! :only, :except, :methods, :errors, :_profile
       child_options = options[:_profile] ? {profile: options[:_profile]} : {}
 
       instance_variables = Mongo::Object.instance_variables(self)
@@ -47,13 +47,19 @@ def to_rson options = {}
       end
 
       methods = options[:methods] ? Array(options[:methods]) : []
-
       methods.each do |method|
         value = send method
         value = Mongo::Object.convert value, :to_rson, child_options
         result[method.to_s] = value
       end
 
+      with_errors = options.include?(:errors) ? options[:errors] : true
+      if with_errors and !(errors = self.errors).empty?
+        stringified_errors = {}
+        errors.each{|k, v| stringified_errors[k.to_s] = v}
+        result['errors'] = stringified_errors
+      end
+      
       result
     end
   end
diff --git a/lib/mongo/model/model.rb b/lib/mongo/model/model.rb
index a56cfb8..d8267e5 100644
--- a/lib/mongo/model/model.rb
+++ b/lib/mongo/model/model.rb
@@ -4,7 +4,8 @@ module Mongo::Model
   attr_accessor :_id, :_class
 
   def _id?; !!_id end
-  def new_record?; !_id end
+  def new?; !_id end
+  alias_method :new_record?, :new?
 
   inherited do
     unless is?(Array) or is?(Hash)
diff --git a/spec/conversion_spec.rb b/spec/conversion_spec.rb
index 8ef8939..6d7e134 100644
--- a/spec/conversion_spec.rb
+++ b/spec/conversion_spec.rb
@@ -82,6 +82,24 @@ def build_post_with_comment
       ]
     }
   end
+  
+  it "should include errors" do
+    Post.class_eval do
+      validates_presence_of :token
+    end
+
+    post = Post.new text: 'StarCraft releasing soon!'
+    post.valid?.should be_false
+    
+    post.to_rson.should == {
+      'text' => 'StarCraft releasing soon!',
+      'errors' => {"token" => ["can't be empty"]}
+    }
+    
+    post.to_rson(errors: false).should == {
+      'text' => 'StarCraft releasing soon!'
+    }
+  end
 
   it "to_json" do
     post = build_post_with_comment
diff --git a/todo/rson.rb b/todo/rson.rb
deleted file mode 100644
index 000a6ec..0000000
--- a/todo/rson.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-module Mongoid::RadMiscellaneous
-  extend ActiveSupport::Concern
-
-  def to_rson options = {}
-    with_errors = if options.include?('errors')
-      options.delete 'errors'
-    elsif options.include?(:errors)
-      options.delete :errors
-    else
-      true
-    end
-
-    # standard MongoMaper as_json conversion
-    hash = as_json(options)
-
-    # MongoMaper fix
-    hash['id'] = hash.delete('_id').to_s if hash.include? '_id'
-
-    # adding errors
-    if with_errors
-      errors = {}
-      errors.each do |name, list|
-        errors[name.to_s] = list
-      end
-      hash['errors'] = errors unless errors.empty?
-    end
-
-    hash
-  end
-end
\ No newline at end of file