How to export a Ruby Array from my Heroku console into CSV?

Question

I am looking to export an array from my heroku console into a local CSV file.

In my current situation, I have a daily rake task which looks for tweets talking about my a

Answer 1

You can't access your local filesystem from the heroku console. One option is to use Tee. Tee sends the output to both STDOUT and a file, so you can have a local log of everything that was printed.

heroku run console | tee output.txt

Answer 2

I tried Tee as suggested, but for some reason it always got stuck after the output of

Running `console` attached to terminal... up, run.1

So I ended up emailing the csv content for me in the text format email body. If you already have emailing set up, that can be easy solution too.

Answer 3

You can also use rails runner to run a line of code or three on heroku and pipe (or tee) the results to a file:

heroku run rails runner \'Tweet.all.to_csv\' -a my-app-name | all_tweets.csv

You can disable rails logging if that's showing up in your file and trim the top of the file if you're getting startup logging like "Running `rails runner`" in your file, but that should be easy to do.

Answer 4

FWIW you could pretty easily puts a string with commas and newlines and then copy paste into your text editor and save as .csv, though "all of the tweets" might be a little unwieldy.

tweets = Tweet.all
@string = String.new()
@string << Tweet.last.attributes.keys.join(", ") + "\n" # "header" row with attribute names


tweets.each do |t|
  @string << t.attributes.values.join(", ") + "\n"
end

puts @string #will output string with \n newline which you could then copy paste into your editor and save as a csv

Answer 5

You can shell out to SCP:

my_data = "hello world"
File.write("tmp/data", my_data)
`scp tmp/data me@some-server:`

It may prompt you about the server being unknown and ask for a password.

Answer 6

Thanks for your help guys, I followed this railscast http://railscasts.com/episodes/362-exporting-csv-and-excel and added a way to export to excel from an admin panel.

Thanks again.