diff options
Diffstat (limited to 'activerecord/lib')
-rw-r--r-- | activerecord/lib/active_record/attribute_methods/primary_key.rb | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb index 365fdeb55a..ba64b8ee2f 100644 --- a/activerecord/lib/active_record/attribute_methods/primary_key.rb +++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb @@ -39,6 +39,20 @@ module ActiveRecord end alias :primary_key= :set_primary_key end + + module InstanceMethods + + # Returns this record's primary key value wrapped in an Array + # or nil if the record is a new_record? + # This is done to comply with the AMo interface that expects + # every AMo compliant object to respond_to?(:key) and return + # an Enumerable object from that call, or nil if new_record? + def key + new_record? ? nil : [ self.id ] + end + + end + end end end |