Class: ROM::Repository::StructAttributes Private

Inherits:
Module
  • Object
show all
Defined in:
lib/rom/repository/struct_attributes.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Method Summary collapse

Constructor Details

#initialize(attributes) ⇒ StructAttributes

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of StructAttributes.



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# File 'lib/rom/repository/struct_attributes.rb', line 5

def initialize(attributes)
  super()

  define_constructor(attributes)

  module_eval do
    include Dry::Equalizer.new(*attributes)

    attr_reader(*attributes)

    define_method(:to_h) do
      attributes.each_with_object({}) do |attribute, h|
        h[attribute] = __send__(attribute)
      end
    end
  end
end

Instance Method Details

#define_constructor(attributes) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/repository/struct_attributes.rb', line 23

def define_constructor(attributes)
  module_eval do
    def __missing_keyword__(keyword)
      raise ArgumentError.new("missing keyword: #{keyword}")
    end
    private :__missing_keyword__
  end

  kwargs = attributes.map { |a| "#{a}: __missing_keyword__(:#{a})" }.join(', ')

  ivs = attributes.map { |a| "@#{a}" }.join(', ')
  values = attributes.join(', ')

  assignment = attributes.size > 0 ? "#{ivs} = #{values}" : EMPTY_STRING

  module_eval("    def initialize(\#{kwargs})\n      \#{assignment}\n    end\n  RUBY\nend\n", __FILE__, __LINE__ + 1)