1 files changed, 3 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb
index 2f32caa257..b5fd0cb370 100644
--- a/activerecord/lib/active_record/attribute_methods/primary_key.rb
+++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb
@@ -57,16 +57,12 @@ module ActiveRecord
         end
 
         module ClassMethods
-          def define_method_attribute(attr_name)
-            super
+          ID_ATTRIBUTE_METHODS = %w(id id= id? id_before_type_cast id_was id_in_database).to_set
 
-            if attr_name == primary_key && attr_name != "id"
-              generated_attribute_methods.send(:alias_method, :id, primary_key)
-            end
+          def instance_method_already_implemented?(method_name)
+            super || primary_key && ID_ATTRIBUTE_METHODS.include?(method_name)
           end
 
-          ID_ATTRIBUTE_METHODS = %w(id id= id? id_before_type_cast id_was id_in_database).to_set
-
           def dangerous_attribute_method?(method_name)
             super && !ID_ATTRIBUTE_METHODS.include?(method_name)
           end