Sinatra with Postgres and ActiveRecord | Error Pushing to Heroku is: Invalid DATABASE_URLI have an application written in Sinatra that works locally but that I cannot seem to push up to heroku. When I attempt to push to heroku I get the following error: -----> Writing config/database.yml to read from DATABASE_URL Could not detect rake tasks ensure you can run $ bundle exec rake -P against your app with no environment variables present and using the production group of your Gemfile. Th
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