class RuboCop::Cop::Rails::RedundantForeignKey

def on_send(node)
  association_with_foreign_key(node) do |type, name, options, foreign_key_pair, foreign_key|
    if redundant?(node, type, name, options, foreign_key)
      add_offense(foreign_key_pair.source_range) do |corrector|
        range = range_with_surrounding_space(foreign_key_pair.source_range, side: :left)
        range = range_with_surrounding_comma(range, :left)
        corrector.remove(range)
      end
    end
  end
end