ruby-on-rails - 应用程序已推送到 heroku 但由于 dotenv gem 而无法工作

Question

我已推送到heroku，但应用程序无法运行。我发现这是由于 dotenv gem 造成的。有没有解决的办法？我需要 dot-env gem 来加密基本身份验证用户名和密码。我不想使用设计或任何复杂的东西，因为这是一个简单的应用程序。

下面是我的 Heroku 终端输出，唯一的问题是我真的不知道如何发现错误/读取输出。

  /app/config/application.rb:4:in `require': cannot load such file -- dotenv (LoadError)
        from /app/config/application.rb:4:in `<top (required)>'
        from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:141:in `require'
        from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:141:in `require_application_and_environment!'
        from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:67:in `console'
        from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
        from /app/bin/rails:9:in `require'
        from /app/bin/rails:9:in `<main>'





gem 'rails', '4.2.5'

gem 'pg'

gem 'sass-rails', '~> 5.0'

gem 'uglifier', '>= 1.3.0'

gem 'coffee-rails', '~> 4.1.0'

gem 'will_paginate', '~> 3.1.0'

gem 'jquery-rails'

gem 'turbolinks'

gem 'jbuilder', '~> 2.0'

gem 'sdoc', '~> 0.4.0', group: :doc

gem "font-awesome-rails"

gem 'dotenv-rails', :groups => [:development, :test]

gem 'will_paginate-bootstrap'

gem "paperclip", "~> 5.0.0"


group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'
  # gem 'dotenv-heroku'

  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
end

Answer 1

您将 dotenv gem 配置为仅针对 开发 和 测试 环境启用:

gem 'dotenv-rails', :groups => [:development, :test]

但是，应用程序是在 Heroku 的生产环境中启动的。因此，Rails 应用程序将崩溃，因为它尝试加载 gem 但它不可用。

您可能在应用程序中的某个位置手动添加了 dotenv 加载代码:

Dotenv::Railtie.load

您需要删除它(因为 dotenv 会在加载 gem 时在加载过程中注入(inject)自身)，或者将代码包装在条件 block 中，仅当定义了 Dotenv 时才执行它

if defined? Dotenv
  # ..
end

除非您确实需要手动加载库(通常不需要)，则只需删除显式语句 explained in the documentation .

dotenv is initialized in your Rails app during the before_configuration callback, which is fired when the Application constant is defined in config/application.rb with class Application < Rails::Application. If you need it to be initialized sooner, you can manually call Dotenv::Railtie.load.