Returns a clone of the record that hasn’t been assigned an id yet and is treated as a new record. Note that this is a "shallow" clone: it copies the object’s attributes only, not its associations. The extent of a "deep" clone is application-specific and is therefore left to the application to implement according to its need.

Source Code

# File active_record/base.rb, line 2000
def clone
  attrs = self.attributes_before_type_cast
  attrs.delete(self.class.primary_key)
  record = self.class.new
  record.send :instance_variable_set, '@attributes', attrs
  record
end