ruby - Rails 错误：“在这台机器上的可用 gem 中找不到 gem 'activerecord-mysql2-adapter (>= 0) ruby​​'

Question

我做了宝石mysql2。这就是我的 GemFile 的样子：

source 'https://rubygems.org'

gem 'rails', '3.2.3'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'sqlite3'


# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
gem 'mysql2' 
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  gem 'therubyracer', :platform => :ruby
gem 'activerecord-mysql2-adapter'
  gem 'uglifier', '>= 1.0.3'

end

gem 'jquery-rails'

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

# To use Jbuilder templates for JSON
# gem 'jbuilder'

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

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'

这是我的配置文件：

development:
  adapter: mysql2
  encoding: utf8
  database: qac_db
  pool: 5
  username: root
  password:
  socket: /tmp/mysql.sock

我哪里错了？

Answer 1

删除该行gem 'activerecord-mysql2-adapter'。然后运行bundle install。

Answer 2

对于它的价值，我删除了我的 database.yml，然后重新创建它，然后一切都开始工作了。不知道为什么，可能是权限问题？