1 files changed, 15 insertions, 16 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb
index bb0ec6a8c3..455e67e19b 100644
--- a/activerecord/lib/active_record/attribute_methods/write.rb
+++ b/activerecord/lib/active_record/attribute_methods/write.rb
@@ -13,19 +13,19 @@ module ActiveRecord
         private
 
           def define_method_attribute=(name)
-            safe_name = name.unpack("h*".freeze).first
-            ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name
             sync_with_transaction_state = "sync_with_transaction_state" if name == primary_key
 
-            generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
-              def __temp__#{safe_name}=(value)
-                name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{safe_name}
-                #{sync_with_transaction_state}
-                _write_attribute(name, value)
-              end
-              alias_method #{(name + '=').inspect}, :__temp__#{safe_name}=
-              undef_method :__temp__#{safe_name}=
-            STR
+            ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method(
+              generated_attribute_methods, name, writer: true,
+            ) do |temp_method_name, attr_name_expr|
+              generated_attribute_methods.module_eval <<-RUBY, __FILE__, __LINE__ + 1
+                def #{temp_method_name}(value)
+                  name = #{attr_name_expr}
+                  #{sync_with_transaction_state}
+                  _write_attribute(name, value)
+                end
+              RUBY
+            end
           end
       end
 
@@ -33,14 +33,13 @@ module ActiveRecord
       # specified +value+. Empty strings for Integer and Float columns are
       # turned into +nil+.
       def write_attribute(attr_name, value)
-        name = if self.class.attribute_alias?(attr_name)
-          self.class.attribute_alias(attr_name).to_s
-        else
-          attr_name.to_s
+        name = attr_name.to_s
+        if self.class.attribute_alias?(name)
+          name = self.class.attribute_alias(name)
         end
 
         primary_key = self.class.primary_key
-        name = primary_key if name == "id".freeze && primary_key
+        name = primary_key if name == "id" && primary_key
         sync_with_transaction_state if name == primary_key
         _write_attribute(name, value)
       end