instance method `to_key`

Ruby on Rails 4.2.9

Since v3.0.20

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to_key()

Returns an Array 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
  include ActiveModel::Conversion
  attr_accessor :id
end

person = Person.create(id: 1)
person.to_key # => [1]

Source

# File activemodel/lib/active_model/conversion.rb, line 53
    def to_key
      key = respond_to?(:id) && id
      key ? [key] : nil
    end

Defined in activemodel/lib/active_model/conversion.rb line 53 · View on GitHub · Improve this page · Find usages on GitHub

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