Convert hash keys to lowercase — Ruby Beginner

Question

My table field names are lowercase and the field names I get from CSV files are camelcase. Is there anyway I can convert the keys of an array of hashes to lowercase?

Answer 1

You can just use the header_converters option with CSV:

CSV.foreach(file, :headers => true, :header_converters => lambda { |h| h.try(:downcase) }) do |row|
  Users.create!(row.to_hash)
end

Important to put the .try in there since an empty header will throw an exception. Much better (and faster) than doing this on every row.