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I trying to use carrierwave gem for upload image in Ruby on rails. following guid and try upload but, some error on my rails. i think caused database timeout, but i don't know what exactly. here's my error screen. I checked my uploader in model class and other things..

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  • Which version of ruby and rails, are you using ? I never used carrierwave but I know that paperclip is now deprecated and it's better to use activestorage. You could take a look at api.rubyonrails.org/files/activestorage/README_md.html. For the database error if it is locked it's maybe because something already locked it for writing something Commented Aug 31, 2020 at 11:23
  • @Snoobie I using rails 6 Commented Sep 1, 2020 at 2:43

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SQLite3 is a file-based database, and locking is little less advanced than a full fledged DB; I would only use it in a few users setting. Maybe you have opened the DB in a SQLite viewer or another process that is locking the DB at the same time?

There are plenty of suggestions in this thread: Ruby: SQLite3::BusyException: database is locked:

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