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Editorial Team
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Editorial Team
Asked: June 11, 20262026-06-11T08:49:37+00:00 2026-06-11T08:49:37+00:00

My Rails app is using version 3.2.3 and I want to deploy to Heroku

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My Rails app is using version 3.2.3 and I want to deploy to Heroku for test (cross browser). I have never had a problem before but now I get the “Sorry something went wrong” message as I try and load my page.

I get this error message in the terminal after running heroku run rake db:migrate:

DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from at /app/config/environment.rb:5)

When I look in my plugins folder there is just an empty gitkeep file.

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  1. Editorial Team
    Editorial Team
    2026-06-11T08:49:38+00:00Added an answer on June 11, 2026 at 8:49 am

    Found the issue, it was a rookie error. I had to set

     config.assets.compress = true
    

    “true” being the important part.

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