module Katello::RemoveUnsupportedBindingDefaults

Public Class Methods

patch(klass, *attributes) click to toggle source

Prepends an initializer to klass that unsets each of attributes that the binding defaulted rather than the caller supplying it. The attribute has to be unset (not set to nil), since to_hash emits an explicit null for nullable attributes whose instance variable is defined.

Calls superclass method

# File lib/monkeys/remove_unsupported_binding_defaults.rb, line 27
def self.patch(klass, *attributes)
  klass.prepend(Module.new do
    define_method(:initialize) do |attrs = {}|
      super(attrs)

      supplied = attrs.is_a?(Hash) ? attrs.keys.map(&:to_sym) : []
      (attributes - supplied).each do |attribute|
        ivar = :"@#{attribute}"
        remove_instance_variable(ivar) if instance_variable_defined?(ivar)
      end
    end
  end)
end