Rails控制台不適用於Digital Ocean上的Dokku

Question

我已經將我的Rails應用程序推送到Digital Ocean Dokku發行版中，除了Rails控制台之外，其他所有功能均正常。 當我運行dokku run myapp rails c出現此錯誤：

/app/vendor/ruby-2.1.2/lib/ruby/2.1.0/irb/completion.rb:9:in `require': libreadline.so.5: cannot open shared object file: No such file or directory - /app/vendor/ruby-2.1.2/lib/ruby/2.1.0/x86_64-linux/readline.so (LoadError)
    from /app/vendor/ruby-2.1.2/lib/ruby/2.1.0/irb/completion.rb:9:in `<top (required)>'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/console.rb:3:in `require'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/console.rb:3:in `<top (required)>'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:128:in `require'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:128:in `require_command!'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:59:in `console'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands.rb:17:in `<top (required)>'
    from /app/bin/rails:4:in `require'
    from /app/bin/rails:4:in `<main>'

該應用程序安裝在干凈的小滴上。 Dokku僅安裝了一個插件（Postgres）。

Answer 1

將gem'rb gem 'rb-readline添加到Gemfile解決了該問題。