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-rw-r--r--activerecord/lib/active_record.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activerecord/lib/active_record.rb b/activerecord/lib/active_record.rb
index b2c1c9c024..5e9ce0600a 100644
--- a/activerecord/lib/active_record.rb
+++ b/activerecord/lib/active_record.rb
@@ -73,6 +73,7 @@ module ActiveRecord
module AttributeMethods
autoload :BeforeTypeCast, 'active_record/attribute_methods/before_type_cast'
autoload :Dirty, 'active_record/attribute_methods/dirty'
+ autoload :PrimaryKey, 'active_record/attribute_methods/primary_key'
autoload :Query, 'active_record/attribute_methods/query'
autoload :Read, 'active_record/attribute_methods/read'
autoload :TimeZoneConversion, 'active_record/attribute_methods/time_zone_conversion'