Returns this record’s primary key value wrapped in an Array or nil if the record is a new_record?
# File D:/Develope/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/activerecord-3.0.9/lib/active_record/attribute_methods/primary_key.rb, line 8 def to_key new_record? ? nil : [ id ] end
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