Module: DataMapper::Equalizer

Included in:
Adapters::AbstractAdapter, Property, Query, Query::Conditions::AbstractComparison, Query::Conditions::AbstractOperation, Query::Operator, Query::Path, Repository
Defined in:
lib/dm-core/support/equalizer.rb

Instance Method Summary collapse

Instance Method Details

#equalize(*methods) ⇒ Object 



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# File 'lib/dm-core/support/equalizer.rb', line 3

def equalize(*methods)
  class_eval <<-RUBY, __FILE__, __LINE__ + 1
    def eql?(other)
      return true if equal?(other)
      instance_of?(other.class) &&
      #{methods.map { |method| "#{method}.eql?(other.#{method})" }.join(' && ')}
    end

    def ==(other)
      return true if equal?(other)
      #{methods.map { |method| "other.respond_to?(#{method.inspect})" }.join(' && ')} &&
      #{methods.map { |method| "#{method} == other.#{method}" }.join(' && ')}
    end

    def hash
      [ #{methods.join(', ')} ].hash
    end
  RUBY
end