git push heroku masterするとエラーでデプロイできず

railsチュートリアル「1.5.2 Herokuにデプロイする」にてcloud9よりruby on railsのアプリをHerokuへデプロイ（git push heroku master）する際にエラーが発生しデプロイできません。解決方法をご教示いただけると幸いです。

発生している問題・エラーメッセージ

git push heroku master                                                                                                                 
Counting objects: 126, done.
Compressing objects: 100% (108/108), done.
Writing objects: 100% (126/126), 155.56 KiB | 3.62 MiB/s, done.
Total 126 (delta 20), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Building on the Heroku-20 stack
remote: -----> Determining which buildpack to use for this app
remote:  !     Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
remote:                         Detected buildpacks: Ruby,Node.js
remote:                         See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order
remote: -----> Ruby app detected
remote: -----> Installing bundler 2.3.10
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-3.1.2
remote: -----> Installing dependencies using bundler 2.3.10
remote:        Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote:        Fetching gem metadata from https://rubygems.org/..........
remote:        Fetching rake 12.3.3
remote:        Installing rake 12.3.3
remote:        Fetching concurrent-ruby 1.1.10

〜中略〜

remote:        Bundle complete! 18 Gemfile dependencies, 59 gems now installed.
remote:        Gems in the groups 'development' and 'test' were not installed.
remote:        Bundled gems are installed into `./vendor/bundle`
remote:        Post-install message from sass:
remote:        
remote:        Ruby Sass has reached end-of-life and should no longer be used.
remote:        
remote:        * If you use Sass as a command-line tool, we recommend using Dart Sass, the new
remote:          primary implementation: https://sass-lang.com/install
remote:        
remote:        * If you use Sass as a plug-in for a Ruby web framework, we recommend using the
remote:          sassc gem: https://github.com/sass/sassc-ruby#readme
remote:        
remote:        * For more details, please refer to the Sass blog:
remote:          https://sass-lang.com/blog/posts/7828841
remote:        
remote:        Bundle completed (28.25s)
remote:        Cleaning up the bundler cache.
remote: -----> Installing node-v16.13.1-linux-x64
remote: -----> Installing yarn-v1.22.17
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote:        Running: rake assets:precompile
remote:        Rails couldn't infer whether you are using multiple databases from your database.yml and can't generate the tasks for the non-primary databases. If you'd like to use this feature, please simplify your ERB.
remote:        rake aborted!
remote:        Psych::BadAlias: Unknown alias: default

〜中略〜

remote:        Tasks: TOP => environment
remote:        (See full trace by running task with --trace)
remote: 
remote:  !
remote:  !     Precompiling assets failed.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote:  !
remote:  ! ## Warning - The same version of this code has already been built: 9f774684b10e4ae53ba64fdb3f667a90081da21c
remote:  !
remote:  ! We have detected that you have triggered a build from source code with version 9f774684b10e4ae53ba64fdb3f667a90081da21c
remote:  ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote:  !
remote:  ! If you are developing on a branch and deploying via git you must run:
remote:  !
remote:  !     git push heroku <branchname>:main
remote:  !
remote:  ! This article goes into details on the behavior:
remote:  !   https://devcenter.heroku.com/articles/duplicate-build-version
remote: 
remote: Verifying deploy...
remote: 
remote: !       Push rejected to thawing-beyond-55905.
remote: 
To https://git.heroku.com/thawing-beyond-55905.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/thawing-beyond-55905.git'

試したこと

webpackerにまつわるエラーが出ていた為 bundle exec rails webpacker:install を実行
エラー原因を探る為heroku logs を実行するも解決に至らず

heroku logs

Build failed -- check your build output: https://dashboard.heroku.com/apps/646b0e0b-383e-413e-8040-ab35861f719c/activity/builds/c08b5759-7fbd-40bc-a977-7b13f50dc5ee

上記ページへ移動、以下エラーを確認

-----> Building on the Heroku-20 stack
-----> Determining which buildpack to use for this app
 !     Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
			Detected buildpacks: Ruby,Node.js
			See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order
-----> Ruby app detected
-----> Installing bundler 2.3.10
-----> Removing BUNDLED WITH version in the Gemfile.lock
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-3.1.2
-----> Installing dependencies using bundler 2.3.10
       Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
       Fetching gem metadata from https://rubygems.org/..........
       Fetching rake 12.3.3
       Installing rake 12.3.3

〜中略〜

       Bundle complete! 18 Gemfile dependencies, 59 gems now installed.
       Gems in the groups 'development' and 'test' were not installed.
       Bundled gems are installed into `./vendor/bundle`
       Post-install message from sass:
       
       Ruby Sass has reached end-of-life and should no longer be used.
       
       * If you use Sass as a command-line tool, we recommend using Dart Sass, the new
         primary implementation: https://sass-lang.com/install
       
       * If you use Sass as a plug-in for a Ruby web framework, we recommend using the
         sassc gem: https://github.com/sass/sassc-ruby#readme
       
       * For more details, please refer to the Sass blog:
         https://sass-lang.com/blog/posts/7828841
       
       Bundle completed (28.25s)
       Cleaning up the bundler cache.
-----> Installing node-v16.13.1-linux-x64
-----> Installing yarn-v1.22.17
-----> Detecting rake tasks
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       Rails couldn't infer whether you are using multiple databases from your database.yml and can't generate the tasks for the non-primary databases. If you'd like to use this feature, please simplify your ERB.
       rake aborted!
       Psych::BadAlias: Unknown alias: default
       /tmp/build_fd22df06/vendor/bundle/ruby/3.1.0
       Tasks: TOP => environment
       (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !
 !     Push rejected, failed to compile Ruby app.
 !     Push failed

configファイルの修正

config/environment/development.rbにてconfig.file_watcher = ActiveSupport::EventedFileUpdateChecker
のコメントアウトで解決したとの記事があった為実施するも変わらず。
【参考】Gemfileのtest・development環境がinstallされない
https://teratail.com/questions/263378

補足情報（FW/ツールのバージョンなど）

ruby 2.7.6
Rails 6.0.4
node v14.19.0

宜しくお願い致します。

行動規範の内容に同意します

回答1件

自己解決

こちらの記事を参考に作業を行ったところ解決しました。
https://unscrupulous-business-firm.com/2022/06/07/ruby-3-1-%E3%81%AB%E3%83%90%E3%83%BC%E3%82%B8%E3%83%A7%E3%83%B3%E3%82%A2%E3%83%83%E3%83%97%E6%99%82%E3%81%AE-unknown-alias-default-psychbadalias-%E5%AF%BE%E5%BF%9C/

以下エラーに注目しました。

Unknown alias: default (Psych::BadAlias)

調べるとライブラリの v3 と v4 で互換性がなくなったことが原因のようです。

config/database.yml

を修正しました。

修正前
adapter,pool,timeoutが共通項目としてdefaultでまとめて設定されています。

default: &default
  adapter: sqlite3
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000

development:
  <<: *default
  database: db/development.sqlite3

test:
  <<: *default
  database: db/test.sqlite3

production:
  <<: *default
  database: db/production.sqlite3

修正後
それを、エイリアスがデフォルト不可となったので以下のように修正しました。

development:
  adapter: sqlite3
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000
  database: db/development.sqlite3

test:
  adapter: sqlite3
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000
  database: db/test.sqlite3

production:
  adapter: sqlite3
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000
  database: db/production.sqlite3

上記修正後、

bundle install
git commit -a -m "Update Gemfile for Heroku"
git push heroku master

を実行したところ、解決しました。

remote: -----> Compressing...
remote:        Done: 86.7M
remote: -----> Launching...
remote:        Released v9
remote:        https://thawing-beyond-55905.herokuapp.com/ deployed to Heroku
〜中略〜
remote: 
remote: Verifying deploy... done.
To https://git.heroku.com/thawing-beyond-55905.git
   3e1bc72..02ded56  master -> master

さらに、URLよりページを開くと以下画面でエラーが表示されましたが
イメージ説明

以下記事を参考に
https://zenn.dev/takuty/articles/eadd7eba7a54f0

以下のライブラリをインストールしデプロイするとエラーなく表示されました。

gem 'net-imap'
gem 'net-pop'
gem 'net-smtp'

投稿2022/10/18 15:54

編集2022/10/18 16:00

masatto16

総合スコア1

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