class RuboCop::Cop::Rails::WhereNot

def extract_column_and_value(template_node, value_node)
  value =
    case template_node.value
    when NOT_EQ_ANONYMOUS_RE, NOT_IN_ANONYMOUS_RE
      value_node&.source
    when NOT_EQ_NAMED_RE, NOT_IN_NAMED_RE
      return unless value_node&.hash_type?
      pair = value_node.pairs.find { |p| p.key.value.to_sym == Regexp.last_match(2).to_sym }
      pair.value.source
    when IS_NOT_NULL_RE
      'nil'
    else
      return
    end
  [Regexp.last_match(1), value]
end