mongo - ruby​​连接问题

Question

我已经安装了mongo和bson_ext,现在我创建了一个带有以下内容的.rb文件::

require 'rubygems'
require 'mongo'

db = Mongo::Connection.new.db("mydb")
db = Mongo::Connection.new("localhost").db("mydb")
db = Mongo::Connection.new("localhost", 27017).db("mydb")

但是,我在运行代码时遇到以下错误

yuzaki@ubuntu:~$ ruby firstruby.rb
/home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:451:in `connect': Failed to connect to a master node at localhost:27017 (Mongo::ConnectionFailure)
    from /home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:554:in `setup'
    from /home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:98:in `initialize'
    from firstruby.rb:4:in `new'
    from firstruby.rb:4:in `<main>'

请帮忙!

Answer 1

现在已经发生了好几次,这里有适合我的解决方案:

sudo rm /var/lib/mongodb/mongod.lock
sudo -u mongodb mongod -f /etc/mongodb.conf --repair
sudo start mongodb
sudo status mongodb

Answer 2

这肯定是由于你的mongo服务器没有运行.因为你在Ubuntu上,尝试做一个sudo /etc/init.d/mongodb start,然后看看你的代码是否有效.