Flowdock
method

to_key

Importance_1
Ruby on Rails latest stable (v4.1.8) - 0 notes - Class: ActiveModel::Conversion
to_key() public

Returns an Enumerable of all key attributes if any is set, regardless if the object is persisted or not. Returns nil if there are no key attributes.

class Person < ActiveRecord::Base
end

person = Person.create
person.to_key # => [1]
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