Active Model Attributes¶ ↑
The Attributes module allows models to define attributes beyond simple Ruby readers and writers. Similar to Active Record attributes, which are typically inferred from the database schema, Active Model Attributes are aware of data types, can have default values, and can handle casting and serialization.
To use Attributes, include the module in your model class and define your attributes using the attribute macro. It accepts a name, a type, a default value, and any other options supported by the attribute type.
Examples¶ ↑
class Person include ActiveModel::Attributes attribute :name, :string attribute :active, :boolean, default: true end person = Person.new person.name = "Volmer" person.name # => "Volmer" person.active # => true
Namespace
Methods
Included Modules
Instance Public methods
attribute_names() Link
Returns an array of attribute names as strings.
class Person include ActiveModel::Attributes attribute :name, :string attribute :age, :integer end person = Person.new person.attribute_names # => ["name", "age"]
attributes() Link
Returns a hash of all the attributes with their names as keys and the values of the attributes as values.
class Person include ActiveModel::Attributes attribute :name, :string attribute :age, :integer end person = Person.new person.name = "Francesco" person.age = 22 person.attributes # => { "name" => "Francesco", "age" => 22}