実稼働環境でコマンド プロンプトから Mailer を使用すると問題が発生します。このコマンドの使用
Mailer.function.deliver
このエラーが発生します
Errno::ENOTDIR: Not a directory - /assets/
from /home/rails/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/open-uri.rb:35:in `initialize'
from /home/rails/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/open-uri.rb:35:in `open'
from /home/rails/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/open-uri.rb:35:in `open'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/css_helper.rb:70:in `request_and_unzip'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/css_helper.rb:45:in `load_css_at_path'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/css_helper.rb:15:in `css_for_doc'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/premailer.rb:14:in `initialize'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/hook.rb:18:in `new'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/premailer-rails3-1.2.0/lib/premailer-rails3/hook.rb:18:in `delivering_email'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/mail-2.3.3/lib/mail/mail.rb:230:in `block in inform_interceptors'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/mail-2.3.3/lib/mail/mail.rb:229:in `each'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/mail-2.3.3/lib/mail/mail.rb:229:in `inform_interceptors'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/mail-2.3.3/lib/mail/message.rb:218:in `inform_interceptors'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/mail-2.3.3/lib/mail/message.rb:228:in `deliver'
from (irb):1
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.1.1/lib/rails/commands/console.rb:45:in `start'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.1.1/lib/rails/commands/console.rb:8:in `start'
from /home/rails/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.1.1/lib/rails/commands.rb:40:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'1.9.3-p194 :002 >
「public/assets」フォルダーを削除すると問題を修正できますが、これにより、本番 Web サイトの残りの部分が画像/css などの読み込みに失敗します。
このコマンドを使用してアセットをプリコンパイルしますrake assets:precompile