ruby-on-rails - 生产环境错误

Question

首先，我是 Rails 的新手。我正在制作一个博客应用程序，当尝试在生产环境中运行它时，两种方式:

rails s -e production

和

RAILS_ENV=production

我犯了同样的错误:

=> Booting WEBrick => Rails 3.2.8 application starting in production on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/home/loku/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-> resolve_hash_connection': database configuration does not specify adapter (ActiveRecord::AdapterNotSpecified)
...

我的设置:

ruby 1.9.3p286 (2012-10-12 revision 37165) [i686-linux]

Rails 3.2.8

数据库.yml:

development:    
  adapter: mysql2    
  encoding: utf8    
  reconnect: false    
  database: blogg_development    
  pool: 5    
  timeout: 5000    
  username: root    
  password: *** 
  host: localhost    

production:    
  adapter: mysql2       
  encoding: utf8    
  reconnect: false    
  database: blogg_production    
  pool: 5    
  timeout: 5000    
  username: root    
  password: ***    
  host: localhost

gem 文件:

source 'https://rubygems.org'
ruby '1.9.3'
gem 'rails', '3.2.8'

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

gem 'mysql2'

# 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'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  gem 'therubyracer', :platforms => :ruby

  gem 'uglifier', '>= 1.0.3'
  gem 'haml-rails'
  gem 'less-rails'
  gem 'twitter-bootstrap-rails', :git => 'git://github.com/seyhunak/twitter-bootstrap-    rails.git'
  #gem 'actionpack', '~> 3.1.0'
end

gem 'jquery-rails'
gem 'haml'
gem 'devise'
gem 'cancan'

group :test, :development do
  gem 'guard-livereload'
  gem 'rb-fsevent'
  gem 'pry'
  gem 'pry-rails'
end

group :linux do
  gem 'libnotify'
end

group :darwin do
  gem 'rb-fsevent', require: false
  gem 'growl'
end

Answer 1

这些是要考虑的事情

Gemfile 中的 mysql2(它是)

config/database.yml 中定义的生产环境(它是)
2.2 从您的 database.yml 中删除任何其他环境并离开生产:仅

确保它正确缩进(我认为是)

捆绑安装(以确保您安装了 gem)

bundle show mysql2 以查看版本并确保它已安装

bundle exec rails s -e production(确保使用 bundle exec)

如果这不起作用，我会查看 config/environments/production.rb 并确保那里没有任何罕见的东西。