"初期化されていない定数Devise :: Mailer"のためにRailsサーバーが起動しない

他のいくつかの記事では他にもいくつかの提案が提案されています。私はまた、依存関係と一緒にdevise gemを再インストールしました。数時間試した後、私は解決策を理解することができず、スタックトレースは私にそれを示し続けます。Devise :: Mailerは、Nameerror例外を持つ初期化されていない定数です。"初期化されていない定数Devise :: Mailer"のためにRailsサーバーが起動しない

私もdevise invitable gemをインストールしましたが、問題は解決しませんでした。私は宝石のファセットをインストールしたときにこれが実際に開始し、スタックトレースを見て持つことができるの下には、私はレール5 を使用しています：

usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:263:in `const_get': uninitialized constant Devise::Mailer (NameError) 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:263:in `block in constantize' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in `each' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in `inject' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in `constantize' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/devise-4.2.0/lib/devise.rb:301:in `get' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/devise-4.2.0/lib/devise.rb:320:in `mailer' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/devise_invitable-1.7.0/lib/devise_invitable/rails.rb:12:in `block in <class:Engine>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:446:in `instance_exec' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:446:in `block in make_lambda' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:192:in `block in simple' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:504:in `block in call' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:504:in `each' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:504:in `call' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:92:in `__run_callbacks__' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:778:in `_run_prepare_callbacks' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:81:in `run_callbacks' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/reloader.rb:83:in `prepare!' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/reloader.rb:55:in `prepare!' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application/finisher.rb:50:in `block in <module:Finisher>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `instance_exec' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `run' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:55:in `block in run_initializers' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `call' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each' 
     from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:54:in `run_initializers' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/application.rb:352:in `initialize!' 
     from /home/ubuntu/workspace/config/environment.rb:5:in `<top (required)>' 
     from /home/ubuntu/workspace/config.ru:3:in `block in <main>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize' 
     from /home/ubuntu/workspace/config.ru:in `new' 
     from /home/ubuntu/workspace/config.ru:in `<main>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:61:in `app' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:139:in `log_to_stdout' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:78:in `start' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in `block in server' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>' 
     from /home/ubuntu/workspace/bin/rails:9:in `require' 
     from /home/ubuntu/workspace/bin/rails:9:in `<top (required)>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `load' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `call' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in `call' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in `run' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in `<top (required)>' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `load' 
     from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `<top (required)>' 
     from /home/ubuntu/workspace/bin/spring:13:in `require' 
     from /home/ubuntu/workspace/bin/spring:13:in `<top (required)>' 
     from bin/rails:3:in `load' 
     from bin/rails:3:in `<main>'

出典

2016-09-03 Nafis Ahmed

は、次のコマンドを実行します。

rails g devise:install

そして、execute rails db:migrateを

シュルを行い、より詳細

ためhttps://github.com/plataformatec/devise上の手順に従ってくださいeこの後にサーバーを再起動する

出典

2016-09-03 12:58:10

は、その工夫がインストールされていて、マイグレーションが実行された、まだ私はそのスタックトレースとエラー –

が開発中のメーラーの設定を追加取得しています言及するのを忘れました。メールを送るためのrb –

このコードを使用している環境に配置してください。したがって、開発サーバーでこれを使用している場合は、config - >development.rbに移動し、このコードを挿入する必要があります。詳細については config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

でガイドを参照してください。http://devise.plataformatec.com.br/#getting-started

出典

2016-09-03 18:20:52

"初期化されていない定数Devise :: Mailer"のためにRailsサーバーが起動しない

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