instance method `to_key`

Ruby on Rails 4.0.13

Since v3.0.20

Compare with:

to_key()

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

class Person < ActiveRecord::Base
end

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

Source

# File activemodel/lib/active_model/conversion.rb, line 51
    def to_key
      key = respond_to?(:id) && id
      key ? [key] : nil
    end

Defined in activemodel/lib/active_model/conversion.rb line 51 · View on GitHub · Improve this page · Find usages on GitHub

Signature