1 files changed, 26 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb
index c7d861a957..1cf3aba41c 100644
--- a/activerecord/lib/active_record/attribute_methods/read.rb
+++ b/activerecord/lib/active_record/attribute_methods/read.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/module/method_transplanting'
+
 module ActiveRecord
   module AttributeMethods
     module Read
@@ -62,9 +64,30 @@ module ActiveRecord
 
         protected
 
-        def define_method_attribute(name)
-          method = ReaderMethodCache[name]
-          generated_attribute_methods.module_eval { define_method name, method }
+        if Module.methods_transplantable?
+          def define_method_attribute(name)
+            method = ReaderMethodCache[name]
+            generated_attribute_methods.module_eval { define_method name, method }
+          end
+        else
+          def define_method_attribute(name)
+            safe_name = name.unpack('h*').first
+            temp_method = "__temp__#{safe_name}"
+
+            ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name
+
+            generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
+              def #{temp_method}
+                name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{safe_name}
+                read_attribute(name) { |n| missing_attribute(n, caller) }
+              end
+            STR
+
+            generated_attribute_methods.module_eval do
+              alias_method name, temp_method
+              undef_method temp_method
+            end
+          end
         end
 
         private