instance method
to_key
Ruby on Rails edge
Since v3.0.20Signature
to_key()Returns an Array of all key attributes if any of the attributes is set, whether or not the object is persisted. Returns nil if there are no key attributes.
“‘ class Person
include ActiveModel::Conversion
attr_accessor :id
def initialize(id)
@id = id
end
end
person = Person.new(1) person.to_key # => [1] “‘
Source
# File activemodel/lib/active_model/conversion.rb, line 74
def to_key
key = respond_to?(:id) && id
key ? Array(key) : nil
end
Defined in activemodel/lib/active_model/conversion.rb line 74
· View on GitHub
· Improve this page
· Find usages on GitHub
Defined in ActiveModel::Conversion