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Try running <code>rake db:migrate RAILS_ENV=development</code> as the message says.
Ok found it. Unicorn run rails in dev by default. Read the chapter “Modifying Rails Environment” on page <br> <br>https://www.digitalocean.com/community/articles/how-to-1-click-install-ruby-on-rails-on-ubuntu-12-10-with-digitalocean
well I think i’s not the point. I want to use the production database, not the dev one. <br>