ruby-on-rails – 无法加载’active_record / connection_adapte

首先,我通过第一个答案解决了这个问题(enter link description here).

现在rails服务器启动了,但是在localhost：3000浏览器上我收到以下错误：

Could not load ‘active_record/connection_adapters/sqlite3_adapter’. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than ‘mysql’,‘mysql2’,‘postgresql’ or ‘sqlite3’ add the necessary adapter gem to the Gemfile.

我已经安装了ruby 2.0.0编译源代码,没有错误或错误.
然后我安装了一些需要的库(sqlite3,libsqlite3-dev)……

这是我的GemFile：

'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]

gem 'execjs'
gem 'therubyracer'

在我的database.yml中：

-# SQLite version 3.x
-#   gem install sqlite3
-#
-#   Ensure the SQLite 3 gem is defined in your Gemfile
-#   gem 'sqlite3'
development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

我的宝石版：

ruby 2.0.0
rails 4.0.0
sqlite 1.3.7