ActiveRecord::Type::ImmutableString (original) (raw)

Active Model ImmutableString Type

Attribute type to represent immutable strings. It casts incoming values to frozen strings.

class Person
  include ActiveModel::Attributes

  attribute :name, :immutable_string
end

person = Person.new
person.name = 1

person.name # => "1"
person.name.frozen? # => true

Values are coerced to strings using their to_s method. Boolean values are treated differently, however: true will be cast to "t" and false will be cast to "f". These strings can be customized when declaring an attribute:

class Person
  include ActiveModel::Attributes

  attribute :active, :immutable_string, true: "aye", false: "nay"
end

person = Person.new
person.active = true

person.active # => "aye"

Methods

N

• new

S

• serialize

T

• type

Class Public methods

new(**args)Link

Source: show | on GitHub

def initialize(**args) @true = -(args.delete(:true)&.to_s || "t") @false = -(args.delete(:false)&.to_s || "f") super end

Instance Public methods

serialize(value)Link

Source: show | on GitHub

def serialize(value) case value when ::Numeric, ::Symbol, ActiveSupport::Duration then value.to_s when true then @true when false then @false else super end end