68002
# 実現したいこと

git push heroku master した時のNoMethodError: undefined method `to_sym' for
nil:NilClassを解消して、デプロイに成功させたい

# 背景

Action_mailerとHeroku shcedulerを使って定期的にメールを1通ユーザーに送る実装をしようと考えていました。そこで、gem
figaroを使って実装進めていました。

# 環境

Rails：5.2.4  
DB:PostgreSQL  
Rubyのbuildpackはインストール済  
(heroku create --buildpack <https://github.com/heroku/heroku-buildpack-
ruby.git>)  
heroku addons:add scheduler:standard

# 今起こっている問題

git push heroku
masterする際に、3つのエラーが発生しており、そのうち2つは[自分の昨日の記事](https://ja.stackoverflow.com/questions/67934/git-
push-heroku-
master%e3%81%a7%e7%99%ba%e7%94%9f%e3%81%99%e3%82%8b%e3%82%a8%e3%83%a9%e3%83%bc-
precompiling-assets-failed-error-failed-to-
pu)と同じものなのですが、もう1つ、下記のようなエラーに初めて出くわしました。

```

    remote:        rake aborted!
    remote:        NoMethodError: undefined method `to_sym' for nil:NilClass
    
```

出てきたエラーに対しログを辿っても、意味が理解できず、解決に苦しんでおります。何か、アドバイス頂ければ幸いです。

to_sym：シンボルを返すrubyのメソッドで、`production.rb`内の

```

    config.action_mailer.delivery_method = ENV['delivery_method'].to_sym
    
```

これが悪さしている？気がします。

# 試したこと

①`gem figaro`をインストール

②`bundle exec figaro install`

③生成された`application.yml`で、以下のように編集

**application.yml**

```

    # Add configuration values here, as shown below.
    #
    # pusher_app_id: "2954"
    # pusher_key: 7381a978f7dd7f9a1117
    # pusher_secret: abdc3b896a0ffb85d373
    # stripe_api_key: sk_test_2J0l093xOyW72XUYJHE4Dv2r
    # stripe_publishable_key: pk_test_ro9jV5SNwGb1yYlQfzG17LHK
    # メール送信サーバの設定(gmail)
    delivery_method:           smtp
    smtp_enable_starttls_auto: true
    smtp_address:              smtp.gmail.com
    smtp_port:                 587
    smtp_domain:               gmail.com
    smtp_authentication:       plain
    smtp_user_name:            （送信元アドレス）@gmail.com
    smtp_password:             （２段階認証で設定したアプリパスワード）
    
    # production:
    #   stripe_api_key: sk_live_EeHnL644i6zo4Iyq4v1KdV9H
    #   stripe_publishable_key: pk_live_9lcthxpSIHbGwmdO941O1XVU
    
```

④`production.rb`には、下記の通り編集

```

    Rails.application.configure do
      # Settings specified here will take precedence over those in config/application.rb.
      config.action_mailer.raise_delivery_errors = true
      config.action_mailer.delivery_method = ENV['delivery_method'].to_sym
      config.action_mailer.default_url_options = { host: 'quiet-escarpment-59252.herokuapp.com'}
      config.action_mailer.smtp_settings = {
        enable_starttls_auto: ENV['smtp_enable_starttls_auto'],
        address: ENV['smtp_address'],
        port: ENV['smtp_port'],
        domain: ENV['smtp_domain'],
        authentication: ENV['smtp_authentication'],
        user_name: ENV['smtp_user_name'],
        password: ENV['smtp_password']
      }
    
    
```

その後、全ての変更は、 git add -A, git commit -m "Message"で行い,git push heroku
masterでデプロイに挑戦しましたが、すべてデプロイできませんでした、、、お力貸して頂けますと幸いです。

# エラー全文

**ログ**

```

    -----> Ruby app detected
    -----> Installing bundler 2.0.2
    -----> Removing BUNDLED WITH version in the Gemfile.lock
    -----> Compiling Ruby/Rails
    -----> Using Ruby version: ruby-2.6.5
    -----> Installing dependencies using bundler 2.0.2
           Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
           The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
           Fetching gem metadata from https://rubygems.org/.........
           Using rake 13.0.1
           Using concurrent-ruby 1.1.6
           Using minitest 5.14.1
           Using thread_safe 0.3.6
           Using builder 3.2.4
           Using mini_portile2 2.4.0
           Using erubi 1.9.0
           Using crass 1.0.6
           Fetching rack 2.2.3
           Using nio4r 2.5.2
           Using websocket-extensions 0.1.5
           Using mini_mime 1.0.2
           Using arel 9.0.0
           Using mimemagic 0.3.5
           Using execjs 2.7.0
           Using bcrypt 3.1.13
           Using msgpack 1.3.3
           Using popper_js 1.16.0
           Using method_source 1.0.0
           Using thor 1.0.1
           Using ffi 1.13.0
           Using tilt 2.0.10
           Using bundler 2.0.2
           Using cocoon 1.2.14
           Using coderay 1.1.3
           Using orm_adapter 0.5.0
           Using devise-bootstrap-views 1.1.0
           Using devise-i18n-views 0.3.7
           Using multi_json 1.14.1
           Using hpricot 0.8.6
           Using kaminari-core 1.2.1
           Using pg 1.2.3
           Using temple 0.8.2
           Using turbolinks-source 5.2.0
           Installing rack 2.2.3
           Using i18n 1.8.2
           Using tzinfo 1.2.7
           Using nokogiri 1.10.9
           Using websocket-driver 0.7.2
           Using puma 4.3.5
           Using mail 2.7.1
           Using marcel 0.3.3
           Using bootsnap 1.4.6
           Using sassc 2.3.0
           Fetching figaro 1.2.0
           Using pry 0.13.1
           Using autoprefixer-rails 9.7.6
           Using uglifier 4.2.0
           Using html2slim 0.2.0
           Using slim 4.1.0
           Installing figaro 1.2.0
           Using turbolinks 5.2.1
           Using activesupport 5.2.4.3
           Using loofah 2.5.0
           Using pry-rails 0.3.9
           Using rails-dom-testing 2.0.3
           Using globalid 0.4.2
           Using activemodel 5.2.4.3
           Using jbuilder 2.10.0
           Using rails-html-sanitizer 1.3.0
           Using activejob 5.2.4.3
           Using activerecord 5.2.4.3
           Using actionview 5.2.4.3
           Using kaminari-activerecord 1.2.1
           Using polyamorous 2.3.2
           Using kaminari-actionview 1.2.1
           Using ransack 2.3.2
           Using kaminari 1.2.1
           Using rack-test 1.1.0
           Using warden 1.2.8
           Using request_store 1.5.0
           Using rack-proxy 0.6.5
           Using actionpack 5.2.4.3
           Using sprockets 4.0.0
           Using actioncable 5.2.4.3
           Using actionmailer 5.2.4.3
           Using activestorage 5.2.4.3
           Using railties 5.2.4.3
           Using gon 6.3.2
           Using chart-js-rails 0.1.7
           Using sprockets-rails 3.2.1
           Using responders 3.0.1
           Using jquery-rails 4.4.0
           Using momentjs-rails 2.20.1
           Using rails-i18n 5.1.3
           Using slim-rails 3.2.0
           Using webpacker 4.2.2
           Using sassc-rails 2.1.2
           Using rails 5.2.4.3
           Using bootstrap 4.5.0
           Using devise 4.7.1
           Using sass-rails 6.0.0
           Using devise-i18n 1.9.1
           Using kaminari-bootstrap 3.0.1
           Bundle complete! 39 Gemfile dependencies, 92 gems now installed.
           Gems in the groups development and test were not installed.
           Bundled gems are installed into `./vendor/bundle`
           Removing rack (2.2.2)
           Bundle completed (3.42s)
           Cleaning up the bundler cache.
    -----> Installing node-v10.15.3-linux-x64
    -----> Installing yarn-v1.16.0
    -----> Detecting rake tasks
    -----> Preparing app for Rails asset pipeline
           Running: rake assets:precompile
           done.
           rake aborted!
           NoMethodError: undefined method `to_sym' for nil:NilClass
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/config/environments/production.rb:4:in `block in <main>'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/railtie.rb:216:in `instance_eval'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/railtie.rb:216:in `configure'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/config/environments/production.rb:1:in `<main>'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `block in require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:257:in `load_dependency'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/engine.rb:608:in `block (2 levels) in <class:Engine>'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/engine.rb:607:in `each'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/engine.rb:607:in `block in <class:Engine>'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:32:in `instance_exec'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:32:in `run'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:61:in `block in run_initializers'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:50:in `each'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:50:in `tsort_each_child'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/initializable.rb:60:in `run_initializers'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/application.rb:361:in `initialize!'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/config/environment.rb:5:in `<main>'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `block in require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:257:in `load_dependency'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `require'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/application.rb:337:in `require_environment!'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/railties-5.2.4.3/lib/rails/application.rb:520:in `block in run_tasks_blocks'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
           /tmp/build_f385a0a2521e560c2ede3dcc72c22ed8/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
           Tasks: TOP => environment
           (See full trace by running task with --trace)
     !
     !     Precompiling assets failed.
     !
     !     Push rejected, failed to compile Ruby app.
     !     Push failed
    remote: Verifying deploy...
    remote: 
    remote: !       Push rejected to quiet-escarpment-59252.
    remote: 
    To https://git.heroku.com/quiet-escarpment-59252.git
     ! [remote rejected] master -> master (pre-receive hook declined)
    error: failed to push some refs to 'https://git.heroku.com/quiet-escarpment-59252.git'
    
```

**application.yml全文**

```

    Rails.application.configure do
      # Settings specified here will take precedence over those in config/application.rb.
      config.action_mailer.raise_delivery_errors = true
      config.action_mailer.delivery_method = ENV['delivery_method'].to_sym
      config.action_mailer.default_url_options = { host: 'quiet-escarpment-59252.herokuapp.com'}
      config.action_mailer.smtp_settings = {
        enable_starttls_auto: ENV['smtp_enable_starttls_auto'],
        address: ENV['smtp_address'],
        port: ENV['smtp_port'],
        domain: ENV['smtp_domain'],
        authentication: ENV['smtp_authentication'],
        user_name: ENV['smtp_user_name'],
        password: ENV['smtp_password']
      }
    
      # user_name: ENV['smtp_user_name'],
      # password: ENV['smtp_password']
      # user_name: ENV['SENDGRID_USERNAME'],
      # password: ENV['SENDGRID_PASSWORD']
      # Code is not reloaded between requests.
      config.cache_classes = true
    
      # Eager load code on boot. This eager loads most of Rails and
      # your application in memory, allowing both threaded web servers
      # and those relying on copy on write to perform better.
      # Rake tasks automatically ignore this option for performance.
      config.eager_load = true
    
      # Full error reports are disabled and caching is turned on.
      config.consider_all_requests_local       = false
      config.action_controller.perform_caching = true
    
      # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
      # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
      # config.require_master_key = true
    
      # Disable serving static files from the `/public` folder by default since
      # Apache or NGINX already handles this.
      config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
    
      # Compress JavaScripts and CSS.
      config.assets.js_compressor = :uglifier
      # config.assets.css_compressor = :sass
    
      # Do not fallback to assets pipeline if a precompiled asset is missed.
      config.assets.compile = true
    
      # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
    
      # Enable serving of images, stylesheets, and JavaScripts from an asset server.
      # config.action_controller.asset_host = 'http://assets.example.com'
    
      # Specifies the header that your server uses for sending files.
      # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
      # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
    
      # Store uploaded files on the local file system (see config/storage.yml for options)
      config.active_storage.service = :local
    
      # Mount Action Cable outside main process or domain
      # config.action_cable.mount_path = nil
      # config.action_cable.url = 'wss://example.com/cable'
      # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
    
      # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
      # config.force_ssl = true
    
      # Use the lowest log level to ensure availability of diagnostic information
      # when problems arise.
      config.log_level = :debug
    
      # Prepend all log lines with the following tags.
      config.log_tags = [ :request_id ]
    
      # Use a different cache store in production.
      # config.cache_store = :mem_cache_store
    
      # Use a real queuing backend for Active Job (and separate queues per environment)
      # config.active_job.queue_adapter     = :resque
      # config.active_job.queue_name_prefix = "tt_manager_#{Rails.env}"
    
      config.action_mailer.perform_caching = false
    
      # Ignore bad email addresses and do not raise email delivery errors.
      # Set this to true and configure the email server for immediate delivery to raise delivery errors.
      # config.action_mailer.raise_delivery_errors = false
    
      # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
      # the I18n.default_locale when a translation cannot be found).
      config.i18n.fallbacks = true
    
      # Send deprecation notices to registered listeners.
      config.active_support.deprecation = :notify
    
      # Use default logging formatter so that PID and timestamp are not suppressed.
      config.log_formatter = ::Logger::Formatter.new
    
      # Use a different logger for distributed setups.
      # require 'syslog/logger'
      # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
    
      if ENV["RAILS_LOG_TO_STDOUT"].present?
        logger           = ActiveSupport::Logger.new(STDOUT)
        logger.formatter = config.log_formatter
        config.logger    = ActiveSupport::TaggedLogging.new(logger)
      end
    
      # Do not dump schema after migrations.
      config.active_record.dump_schema_after_migration = false
    end
    
```
CC BY-SA 4.0
2020-06-25T06:26:32.997
67983
2020-06-25T17:23:03.617
39475
question
ruby-on-rails heroku gmail rbenv sendmail
git push heroku master　した時のNoMethodError: undefined method `to_sym' for nil:NilClassを解消したい
確かに、

```

    config.action_mailer.delivery_method = ENV['delivery_method'].to_sym
    
```

の行でエラーになっていそうです。環境変数 `delivery_method` を設定しておらず `ENV['delivery_method']` が
`nil` になったため、`nil.to_sym` をしようとしてエラーになっているように見えます。

本来ならば application.yml に書いてある設定を figaro gem
が読み込んで環境変数に出してくれるはずなので、この一連の流れのどこかが上手くいってなさそうですね。

で、figaro gem の初期設定では application.yml は .gitignore されるので Heroku の環境側に
application.yml が存在していないのではないでしょうか。このファイルには秘匿値も入りうる想定なので、単に git push
するのでは公開されないようになっています。この仮説のもと質問者さんの操作手順を見ると、Heroku の環境に application.yml
を送り込むコマンドである、

```

    figaro heroku:set -e production
    
```

を実行していなさそうです。README の <https://github.com/laserlemon/figaro#deployment>
あたりに書かれているので、こちらを試してみてください。
CC BY-SA 4.0
2020-06-25T17:23:03.617
68002
2020-06-25T17:23:03.617
19110
67983
answer