Question

我键入rails s来运行我的服务器然后我得到了这个：

    Warning: Running `gem pristine --all` to regenerate your installed           gemspecs (and deleting then reinstalling your bundle if you use bundle --path) will improve the startup performance of Spring.
Could not find gem 'pg' in any of the gem sources listed in your Gemfile or available on this machine.
Run `bundle install` to install missing gems.

所以我做了捆绑安装然后我得到了这个：

An error occurred while installing pg (0.18.4), and Bundler cannot continue.
Make sure that `gem install pg -v '0.18.4'` succeeds before bundling.

我做了brew install postgres来解决这个问题，但它仍然没有用。我还在Gemfile上放了'gem pg'0.18.4'然后进行了捆绑安装，但仍然没有用。

我需要你的帮助！下面是我的Gemfile

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.5.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3', group: [:development, :test]

gem 'pg', group: :production
#gem 'pg', '0.18.4'

gem 'rails_12factor', group: :production
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Unicorn as the app server
# gem 'unicorn'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

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'

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

Answer 1

您是否尝试过清理并重建宝石束？您可以使用命令bundle clean --force然后再使用bundle install来执行此操作。

请注意：clean命令将删除所有宝石。

如果您决定运行这些命令，请回发这些命令的结果。

我运行bundle install时遇到错误

1 个答案: