6
我的虛擬機重新啓動後，任何時候我嘗試訪問任何數據，我得到這個錯誤。我正在使用Rails 3.2.3，Mongodb w/Mongoid。這是我使用MongoDB和Mongoid的第一個項目，我相當確定這個問題與它有關。看起來Mongo已經開始運行了。完整的錯誤信息是：NoMethodError：未定義的方法` - '爲零：NilClass
NoMethodError: undefined method `-' for nil:NilClass
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/cluster.rb:118:in `block in refresh'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/cluster.rb:125:in `each'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/cluster.rb:125:in `refresh'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/cluster.rb:78:in `nodes'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/cluster.rb:187:in `with_secondary'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/session/context.rb:104:in `with_node'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/session/context.rb:43:in `query'
from /home/development/.rvm/gems/[email protected]/gems/moped-1.2.5/lib/moped/query.rb:109:in `first'
from /home/development/.rvm/gems/[email protected]/gems/mongoid-3.0.6/lib/mongoid/contextual/mongo.rb:201:in `first'
from /home/development/.rvm/gems/[email protected]/gems/mongoid-3.0.6/lib/mongoid/contextual.rb:18:in `first'
from /home/development/.rvm/gems/[email protected]/gems/mongoid-3.0.6/lib/mongoid/finders.rb:119:in `first'
from (irb):3
from /home/development/.rvm/gems/[email protected]/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
from /home/development/.rvm/gems/[email protected]/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
from /home/development/.rvm/gems/[email protected]/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
就是這樣。你是個天才男人，謝謝。 –