I started to learn ruby on rails a few days ago with "rails tutorial" and I already got stuck with the error below.
Application error An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. This error occurred when I tried to deploy an app:
ec2-user:~/environment/hello_app (master) $ heroku create ec2-user:~/environment/hello_app (master) $ git push heroku master Counting objects: 1, done. Writing objects: 100% (1/1), 211 bytes | 211.00 KiB/s, done. Total 1 (delta 0), reused 0 (delta 0) remote: Compressing source files... done. remote: Building source: remote: remote: -----> Ruby app detected remote: -----> Compiling Ruby/Rails remote: -----> Using Ruby version: ruby-2.3.4 remote: -----> Installing dependencies using bundler 1.15.2 remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`. remote: Fetching gem metadata from https://rubygems.org/......... remote: Fetching version metadata from https://rubygems.org/.. remote: Fetching dependency metadata from https://rubygems.org/. remote: Using rake 12.3.0 remote: Using concurrent-ruby 1.0.5 remote: Using minitest 5.11.3 remote: Using thread_safe 0.3.6 remote: Using builder 3.2.3 remote: Using erubi 1.7.1 remote: Using mini_portile2 2.3.0 remote: Using crass 1.0.3 remote: Using rack 2.0.4 remote: Using nio4r 2.2.0 remote: Using websocket-extensions 0.1.3 remote: Using mini_mime 1.0.0 remote: Using arel 8.0.0 remote: Using bundler 1.15.2 remote: Using coffee-script-source 1.12.2 remote: Using execjs 2.7.0 remote: Using method_source 0.9.0 remote: Using thor 0.20.0 remote: Using ffi 1.9.23 remote: Using multi_json 1.13.1 remote: Using puma 3.9.1 remote: Using rb-fsevent 0.10.3 remote: Using tilt 2.0.8 remote: Using turbolinks-source 5.1.0 remote: Using tzinfo 1.2.5 remote: Using nokogiri 1.8.2 remote: Using i18n 0.9.5 remote: Using rack-test 0.8.3 remote: Using sprockets 3.7.1 remote: Using websocket-driver 0.6.5 remote: Using mail 2.7.0 remote: Using coffee-script 2.4.1 remote: Using uglifier 3.2.0 remote: Using rb-inotify 0.9.10 remote: Using turbolinks 5.0.1 remote: Using loofah 2.2.0 remote: Using activesupport 5.1.4 remote: Using sass-listen 4.0.0 remote: Using rails-html-sanitizer 1.0.3 remote: Using sass 3.5.5 remote: Using rails-dom-testing 2.0.3 remote: Using globalid 0.4.1 remote: Using activemodel 5.1.4 remote: Using jbuilder 2.6.4 remote: Using actionview 5.1.4 remote: Using activejob 5.1.4 remote: Using activerecord 5.1.4 remote: Using actionpack 5.1.4 remote: Using actioncable 5.1.4 remote: Using actionmailer 5.1.4 remote: Using railties 5.1.4 remote: Using sprockets-rails 3.2.1 remote: Using coffee-rails 4.2.2 remote: Using jquery-rails 4.3.1 remote: Using rails 5.1.4 remote: Using sass-rails 5.0.6 remote: Bundle complete! 15 Gemfile dependencies, 56 gems now installed. remote: Gems in the groups development and test were not installed. remote: Bundled gems are installed into ./vendor/bundle. remote: Bundle completed (3.14s) remote: Cleaning up the bundler cache. remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`. remote: The latest bundler is 1.16.1, but you are currently running 1.15.2. remote: To update, run `gem install bundler` remote: -----> Installing node-v6.11.1-linux-x64 remote: -----> Detecting rake tasks remote: -----> Preparing app for Rails asset pipeline remote: Running: rake assets:precompile remote: Yarn executable was not detected in the system. remote: Download Yarn at https://yarnpkg.com/en/docs/install remote: Asset precompilation completed (1.65s) remote: Cleaning assets remote: Running: rake assets:clean remote: remote: ###### WARNING: remote: You have not declared a Ruby version in your Gemfile. remote: To set your Ruby version add this line to your Gemfile: remote: ruby '2.3.4' remote: # See https://devcenter.heroku.com/articles/ruby-versions for more information. remote: remote: -----> Discovering process types remote: Procfile declares types -> web remote: Default types for buildpack -> console, rake, worker remote: remote: -----> Compressing... remote: Done: 35.8M remote: -----> Launching... remote: Released v9 remote: https://obscure-lake-54868.herokuapp.com/ deployed to Heroku remote: remote: Verifying deploy... done. To https://git.heroku.com/obscure-lake-54868.git 37e8a0c..97c59d3 master -> master I added the line ruby '2.3.4' to Gemfile but this warning still doesn't disappear. As this error says, I ran heroku logs but I have no idea how to fix this. Below is the result of heroku logs. Sorry it's super long.
ec2-user:~/environment/hello_app (master) $ heroku logs 2018-03-16T05:35:32.900603+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/command.rb:44:in `invoke' 2018-03-16T05:35:32.900608+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands.rb:16:in `<top (required)>' 2018-03-16T05:35:32.900610+00:00 app[web.1]: from bin/rails:9:in `require' 2018-03-16T05:35:32.900612+00:00 app[web.1]: from bin/rails:9:in `<main>' 2018-03-16T05:35:32.912746+00:00 app[web.1]: => Booting Puma 2018-03-16T05:35:32.912753+00:00 app[web.1]: => Rails 5.1.4 application starting in production 2018-03-16T05:35:32.912755+00:00 app[web.1]: => Run `rails server -h` for more startup options 2018-03-16T05:35:32.912756+00:00 app[web.1]: Exiting 2018-03-16T05:35:33.004749+00:00 heroku[web.1]: State changed from starting to crashed 2018-03-16T05:35:33.006915+00:00 heroku[web.1]: State changed from crashed to starting 2018-03-16T05:35:32.972692+00:00 heroku[web.1]: Process exited with status 1 2018-03-16T05:35:36.687462+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 4593 -e production` 2018-03-16T05:35:41.293329+00:00 heroku[web.1]: State changed from starting to crashed 2018-03-16T05:35:41.279319+00:00 heroku[web.1]: Process exited with status 1 2018-03-16T05:35:41.177337+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/connection_specification.rb:185:in `spec' 2018-03-16T05:35:41.177313+00:00 app[web.1]: /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/connection_specification.rb:188:in `rescue in spec': Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError) 2018-03-16T05:35:41.177352+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:880:in `establish_connection' 2018-03-16T05:35:41.177354+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_handling.rb:58:in `establish_connection' 2018-03-16T05:35:41.177360+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/railtie.rb:124:in `block (2 levels) in <class:Railtie>' 2018-03-16T05:35:41.177362+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval' 2018-03-16T05:35:41.177364+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook' 2018-03-16T05:35:41.177365+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control' 2018-03-16T05:35:41.177366+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook' 2018-03-16T05:35:41.177368+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks' 2018-03-16T05:35:41.177370+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:49:in `each' 2018-03-16T05:35:41.177371+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks' 2018-03-16T05:35:41.177373+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/base.rb:326:in `<module:ActiveRecord>' 2018-03-16T05:35:41.177374+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/base.rb:25:in `<top (required)>' 2018-03-16T05:35:41.177376+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require' 2018-03-16T05:35:41.177378+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `block in require' 2018-03-16T05:35:41.177379+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:258:in `load_dependency' 2018-03-16T05:35:41.177381+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require' 2018-03-16T05:35:41.177382+00:00 app[web.1]: from /app/app/models/application_record.rb:1:in `<top (required)>' 2018-03-16T05:35:41.177387+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require' 2018-03-16T05:35:41.177388+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `block in require' 2018-03-16T05:35:41.177390+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:258:in `load_dependency' 2018-03-16T05:35:41.177391+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require' 2018-03-16T05:35:41.177393+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:379:in `block in require_or_load' 2018-03-16T05:35:41.177394+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:36:in `block in load_interlock' 2018-03-16T05:35:41.177396+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies/interlock.rb:12:in `block in loading' 2018-03-16T05:35:41.177398+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/concurrency/share_lock.rb:149:in `exclusive' 2018-03-16T05:35:41.177399+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies/interlock.rb:11:in `loading' 2018-03-16T05:35:41.177404+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:36:in `load_interlock' 2018-03-16T05:35:41.177405+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:357:in `require_or_load' 2018-03-16T05:35:41.177407+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:335:in `depend_on' 2018-03-16T05:35:41.177408+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:251:in `require_dependency' 2018-03-16T05:35:41.177410+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:476:in `block (2 levels) in eager_load!' 2018-03-16T05:35:41.177412+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:475:in `each' 2018-03-16T05:35:41.177416+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:475:in `block in eager_load!' 2018-03-16T05:35:41.177418+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:473:in `each' 2018-03-16T05:35:41.177420+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:473:in `eager_load!' 2018-03-16T05:35:41.177421+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:354:in `eager_load!' 2018-03-16T05:35:41.177423+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/application/finisher.rb:67:in `each' 2018-03-16T05:35:41.177428+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/application/finisher.rb:67:in `block in <module:Finisher>' 2018-03-16T05:35:41.177429+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/initializable.rb:30:in `instance_exec' 2018-03-16T05:35:41.177431+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/initializable.rb:30:in `run' 2018-03-16T05:35:41.177432+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/initializable.rb:59:in `block in run_initializers' 2018-03-16T05:35:41.177436+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each' 2018-03-16T05:35:41.177474+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component' 2018-03-16T05:35:41.177526+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component' 2018-03-16T05:35:41.177502+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from' 2018-03-16T05:35:41.177550+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each' 2018-03-16T05:35:41.177575+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `call' 2018-03-16T05:35:41.177599+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component' 2018-03-16T05:35:41.177623+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each' 2018-03-16T05:35:41.177646+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each' 2018-03-16T05:35:41.177673+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/initializable.rb:58:in `run_initializers' 2018-03-16T05:35:41.177720+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/application.rb:353:in `initialize!' 2018-03-16T05:35:41.177748+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>' 2018-03-16T05:35:41.177773+00:00 app[web.1]: from config.ru:3:in `require_relative' 2018-03-16T05:35:41.177798+00:00 app[web.1]: from config.ru:3:in `block in <main>' 2018-03-16T05:35:41.177822+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/builder.rb:55:in `instance_eval' 2018-03-16T05:35:41.177846+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/builder.rb:55:in `initialize' 2018-03-16T05:35:41.177871+00:00 app[web.1]: from config.ru:in `new' 2018-03-16T05:35:41.177896+00:00 app[web.1]: from config.ru:in `<main>' 2018-03-16T05:35:41.177920+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/builder.rb:49:in `eval' 2018-03-16T05:35:41.177944+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/builder.rb:49:in `new_from_string' 2018-03-16T05:35:41.177968+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/builder.rb:40:in `parse_file' 2018-03-16T05:35:41.177992+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/server.rb:319:in `build_app_and_options_from_config' 2018-03-16T05:35:41.178019+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/server.rb:219:in `app' 2018-03-16T05:35:41.178045+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:24:in `app' 2018-03-16T05:35:41.178071+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/server.rb:354:in `wrapped_app' 2018-03-16T05:35:41.178096+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-2.0.4/lib/rack/server.rb:283:in `start' 2018-03-16T05:35:41.178121+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:44:in `start' 2018-03-16T05:35:41.178152+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:135:in `block in perform' 2018-03-16T05:35:41.178177+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in `tap' 2018-03-16T05:35:41.178199+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in `perform' 2018-03-16T05:35:41.178247+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command' 2018-03-16T05:35:41.178223+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run' 2018-03-16T05:35:41.178272+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch' 2018-03-16T05:35:41.178295+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/command/base.rb:63:in `perform' 2018-03-16T05:35:41.178319+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/command.rb:44:in `invoke' 2018-03-16T05:35:41.178341+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands.rb:16:in `<top (required)>' 2018-03-16T05:35:41.178363+00:00 app[web.1]: from bin/rails:9:in `require' 2018-03-16T05:35:41.178388+00:00 app[web.1]: from bin/rails:9:in `<main>' 2018-03-16T05:35:41.196457+00:00 app[web.1]: => Booting Puma 2018-03-16T05:35:41.196462+00:00 app[web.1]: => Rails 5.1.4 application starting in production 2018-03-16T05:35:41.196464+00:00 app[web.1]: => Run `rails server -h` for more startup options 2018-03-16T05:35:41.196466+00:00 app[web.1]: Exiting 2018-03-16T05:35:42.194333+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=obscure-lake-54868.herokuapp.com request_id=5db8303d-ff52-4273-a347-a73b46ef1d72 fwd="115.165.98.19" dyno= connect= service= status=503 bytes= protocol=https 2018-03-16T05:35:42.900389+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=obscure-lake-54868.herokuapp.com request_id=37e231a2-72ce-45da-95a3-0f0301c50abd fwd="115.165.98.19" dyno= connect= service= status=503 bytes= protocol=https After visiting other websites, I tried $ heroku ps:restart web.1 but the error didn't disappear. Could anyone help me out? I'm not good at English so forgive me for some grammatical errors.
*below is my Gemfile
source 'https://rubygems.org' ruby "2.3.4" gem 'rails', '5.1.4' gem 'puma', '3.9.1' gem 'sass-rails', '5.0.6' gem 'uglifier', '3.2.0' gem 'coffee-rails', '4.2.2' gem 'jquery-rails', '4.3.1' gem 'turbolinks', '5.0.1' gem 'jbuilder', '2.6.4' group :development, :test do gem 'sqlite3', '1.3.13' gem 'byebug', '9.0.6', platform: :mri end group :development do gem 'web-console', '3.5.1' gem 'listen', '3.1.5' gem 'spring', '2.0.2' gem 'spring-watcher-listen', '2.0.1' end group :production do gem 'pg', '~> 0.20.0' end gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby] 
