Flowdock
method

to_ary

Importance_1
Ruby on Rails latest stable (v4.1.8) - 0 notes - Class: Core
to_ary() private

Under Ruby 1.9, Array#flatten will call #to_ary (recursively) on each of the elements of the array, and then rescues from the possible NoMethodError. If those elements are ActiveRecord::Base’s, then this triggers the various method_missing’s that we have, which significantly impacts upon performance.

So we can avoid the method_missing hit by explicitly defining #to_ary as nil here.

See also http://tenderlovemaking.com/2011/06/28/til-its-ok-to-return-nil-from-to_ary.html

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