module ActiveModel::Attributes::ClassMethods
Public Instance Methods
attribute(name, type = Type::Value.new, **options)
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# File lib/active_model/attributes.rb, line 18 def attribute(name, type = Type::Value.new, **options) name = name.to_s if type.is_a?(Symbol) type = ActiveModel::Type.lookup(type, **options.except(:default)) end self.attribute_types = attribute_types.merge(name => type) define_default_attribute(name, options.fetch(:default, NO_DEFAULT_PROVIDED), type) 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 39 def attribute_names attribute_types.keys end
Private Instance Methods
define_default_attribute(name, value, type)
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# File lib/active_model/attributes.rb, line 60 def define_default_attribute(name, value, type) self._default_attributes = _default_attributes.deep_dup if value == NO_DEFAULT_PROVIDED default_attribute = _default_attributes[name].with_type(type) else default_attribute = Attribute::UserProvidedDefault.new( name, value, type, _default_attributes.fetch(name.to_s) { nil }, ) end _default_attributes[name] = default_attribute end
define_method_attribute=(name)
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# File lib/active_model/attributes.rb, line 44 def define_method_attribute=(name) ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method( generated_attribute_methods, name, writer: true, ) do |temp_method_name, attr_name_expr| generated_attribute_methods.module_eval <<-RUBY, __FILE__, __LINE__ + 1 def #{temp_method_name}(value) name = #{attr_name_expr} write_attribute(name, value) end RUBY end end