1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb
index faed703167..dcc3d79de9 100644
--- a/activerecord/lib/active_record/attribute_methods/read.rb
+++ b/activerecord/lib/active_record/attribute_methods/read.rb
@@ -67,7 +67,9 @@ module ActiveRecord
         @attributes_cache.fetch(attr_name.to_s) { |name|
           column = @columns_hash.fetch(name) {
             return @attributes.fetch(name) {
-              @attributes[self.class.primary_key] if name == 'id'
+              if name == 'id' && self.class.primary_key != name
+                read_attribute(self.class.primary_key)
+              end
             }
           }