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I am using spreadsheet gem to generate a xls file in my applications public folder and then using the send_file method to send the file.
My code worked properly on my local machine in test as well as production mode.
But when I deployed this code on heroku it showed the following error:
Permission denied – /app/public/history_23.xls
Can anyone suggest the solution please.
Heroku has a read only file system, you CANNOT write to any where except the tmp and log directory –
http://devcenter.heroku.com/articles/read-only-filesystem