serializable_hash

Returns a serialized hash of your object.

class Person
  include ActiveModel::Serialization

  attr_accessor :name, :age

  def attributes
    {'name' => nil, 'age' => nil}
  end

  def capitalized_name
    name.capitalize
  end
end

person = Person.new
person.name = 'bob'
person.age  = 22
person.serializable_hash                # => {"name"=>"bob", "age"=>22}
person.serializable_hash(only: :name)   # => {"name"=>"bob"}
person.serializable_hash(except: :name) # => {"age"=>22}
person.serializable_hash(methods: :capitalized_name)
# => {"name"=>"bob", "age"=>22, "capitalized_name"=>"Bob"}

Example with :include option

class User
  include ActiveModel::Serializers::JSON
  attr_accessor :name, :notes # Emulate has_many :notes
  def attributes
    {'name' => nil}
  end
end

class Note
  include ActiveModel::Serializers::JSON
  attr_accessor :title, :text
  def attributes
    {'title' => nil, 'text' => nil}
  end
end

note = Note.new
note.title = 'Battle of Austerlitz'
note.text = 'Some text here'

user = User.new
user.name = 'Napoleon'
user.notes = [note]

user.serializable_hash
# => {"name" => "Napoleon"}
user.serializable_hash(include: { notes: { only: 'title' }})
# => {"name" => "Napoleon", "notes" => [{"title"=>"Battle of Austerlitz"}]}