module ActiveModel::Attributes::ClassMethods
Public Instance Methods
attribute(name, cast_type = nil, default: nil, **options)
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Defines a model attribute. In addition to the attribute name, a cast type and default value may be specified, as well as any options supported by the given cast type.
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
Calls superclass method
# File lib/active_model/attributes.rb, line 59 def attribute(name, ...) super define_attribute_method(name) end
attribute_names()
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Returns an array of attribute names as strings.
class Person include ActiveModel::Attributes attribute :name, :string attribute :age, :integer end Person.attribute_names # => ["name", "age"]
# File lib/active_model/attributes.rb, line 74 def attribute_names attribute_types.keys end
Private Instance Methods
define_method_attribute=(name, owner:)
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# File lib/active_model/attributes.rb, line 79 def define_method_attribute=(name, owner:) ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method( owner, name, writer: true, ) do |temp_method_name, attr_name_expr| owner.define_cached_method("#{name}=", as: temp_method_name, namespace: :active_model) do |batch| batch << "def #{temp_method_name}(value)" << " _write_attribute(#{attr_name_expr}, value)" << "end" end end end