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Active Model Basic Model

Allows implementing models similar to ActiveRecord::Base. Includes ActiveModel::API for the required interface for an object to interact with Action Pack and Action View, but can be extended with other functionalities.

A minimal implementation could be:

class Person
  include ActiveModel::Model
  attr_accessor :name, :age
end

person = Person.new(name: 'bob', age: '18')
person.name # => "bob"
person.age  # => "18"

If for some reason you need to run code on initialize, make sure you call super if you want the attributes hash initialization to happen.

class Person
  include ActiveModel::Model
  attr_accessor :id, :name, :omg

  def initialize(attributes={})
    super
    @omg ||= true
  end
end

person = Person.new(id: 1, name: 'bob')
person.omg # => true

For more detailed information on other functionalities available, please refer to the specific modules included in ActiveModel::Model (see below).

Methods
S
V
Included Modules

Instance Public methods

slice(*methods)

Returns a hash of the given methods with their names as keys and returned values as values.

person = Person.new(id: 1, name: "bob")
person.slice(:id, :name)
=> { "id" => 1, "name" => "bob" }

Source: on GitHub 

# File activemodel/lib/active_model/model.rb, line 48

values_at(*methods)

Returns an array of the values returned by the given methods.

person = Person.new(id: 1, name: "bob")
person.values_at(:id, :name)
=> [1, "bob"]

Source: on GitHub 

# File activemodel/lib/active_model/model.rb, line 63