ruby-on-rails – Sqlite3 gem未加载,gem安装并在项目中指定

执行rails服务器时,它会按预期启动,但是当您将localhost：3000放入标准Web浏览器时,它会回复以下内容：

Specified ‘sqlite3’ for database adapter,but the gem is not loaded. Add gem 'sqlite3' to your Gemfile.

现在这里是令人困惑的部分.我安装了sqlite3(64位版本,因为这是我下载的,运行的是64位操作系统),由gem查询验证(这里是宝石的完整列表)

卸载和重新安装并不能解决手头的问题,但它确实安装顺利.另外我正在测试的项目的gemfile是folliwing

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails',github: 'rails/rails'
gem 'rails','4.0.0'

# Use sqlite3 as the database for Active Record
gem 'sqlite3'

# Use SCSS for stylesheets
gem 'sass-rails','~> 4.0.0'

# Use Uglifier as compressor for JavaScript assets
gem 'uglifier','>= 1.3.0'

# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails','~> 4.0.0'

# See https://github.com/sstephenson/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','~> 1.2'

group :doc do
  # bundle exec rake doc:rails generates the API under doc/api.
  gem 'sdoc',require: false
end

# Use ActiveModel has_secure_password
# gem 'bcrypt-ruby','~> 3.0.0'

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

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

# Use debugger
# gem 'debugger',group: [:development,:test]

正如你所看到的,很早就在Gemfile中指定了sqlite3,但是当我尝试加载主页时,无论出于何种原因,它就像它不存在一样.

此机器的详细信息如下所述：宝石部分中未提及：

Rails 4
Ruby 2
Windows 7的

以前有人遇到过这个吗？