module ActiveModel::AttributeMethods::ClassMethods

person.name_short? # => true
person.name # => "Bob"
person.name = 'Bob'
person = Person.new

end
end
send(attr).length < 5
def attribute_short?(attr)
private

define_attribute_method :name
# attribute_method_affix declarations.
# attribute_method_prefix, attribute_method_suffix or
# Call to define_attribute_method must appear after the

attribute_method_suffix '_short?'
attr_accessor :name

include ActiveModel::AttributeMethods
class Person

method, or they will not hook in.
+define_attribute_method+ after you define any prefix, suffix or affix
To use, pass an attribute name (as string or symbol). Be sure to declare

+ActiveModel::AttributeMethods+.
Declares an attribute that should be prefixed and suffixed by

def define_attribute_method(attr_name, _owner: generated_attribute_methods, as: attr_name)
  ActiveSupport::CodeGenerator.batch(_owner, __FILE__, __LINE__) do |owner|
    attribute_method_patterns.each do |pattern|
      define_attribute_method_pattern(pattern, attr_name, owner: owner, as: as)
    end
    attribute_method_patterns_cache.clear
  end
end