Recently, I was building a yelp clone and deploying it to Heroku. I was using Ruby 2.6.0 and Rails 6 to build the application and came across some difficulties.
Some errors you may get while deploying to Heroku using my dependencies and the
rails new command.
(1) Heroku does not support sqlite3
Fix this with the right db/config file for postgresql and removing ‘sqlite3’ from your Gemfile and adding ‘gem ‘pg” to your Gemfile.
Replace your current config file with the following for example:
development: adapter: postgresql database: my_database_development pool: 5 timeout: 5000 test: adapter: postgresql database: my_database_test pool: 5 timeout: 5000 production: adapter: postgresql database: my_database_production pool: 5 timeout: 5000
(2) Bundler 2 is required for Heroku to run the build.
Fix: Upgrade Ruby version from 2.6.0 => 2.6.1 This is done to fix the Bundler 2 install error from Heroku on attempting git push heroku master.
(3) For any resource that does not exist error for your database in your heroku logs —tail
heroku run rake db:migrate.
Congratulations! Your app is now deployed to Heroku!