1 files changed, 7 insertions, 4 deletions
diff --git a/activemodel/lib/active_model/attributes.rb b/activemodel/lib/active_model/attributes.rb
index cac461b549..5bf213d593 100644
--- a/activemodel/lib/active_model/attributes.rb
+++ b/activemodel/lib/active_model/attributes.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require "active_support/core_ext/object/deep_dup"
 require "active_model/attribute_set"
 require "active_model/attribute/user_provided_default"
 
@@ -24,13 +23,13 @@ module ActiveModel
         end
         self.attribute_types = attribute_types.merge(name => type)
         define_default_attribute(name, options.fetch(:default, NO_DEFAULT_PROVIDED), type)
-        define_attribute_methods(name)
+        define_attribute_method(name)
       end
 
       private
 
         def define_method_attribute=(name)
-          safe_name = name.unpack("h*".freeze).first
+          safe_name = name.unpack1("h*".freeze)
           ActiveModel::AttributeMethods::AttrNames.set_name_cache safe_name, name
 
           generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
@@ -67,6 +66,10 @@ module ActiveModel
       super
     end
 
+    def attributes
+      @attributes.to_hash
+    end
+
     private
 
       def write_attribute(attr_name, value)
@@ -100,7 +103,7 @@ module ActiveModel
       def self.set_name_cache(name, value)
         const_name = "ATTR_#{name}"
         unless const_defined? const_name
-          const_set const_name, value.dup.freeze
+          const_set const_name, -value
         end
       end
     }