mongoid的Rails應用程序...（Mongoid :: Errors :: NoSessionConfig）：沒有配置可以找到一個名爲'默認'的會話

Question

參考https://github.com/mongoid/mongoid/issues/2894#issuecomment-14903927 我已經做了所有必要的更改...仍然問題是有...

spec_helper.rb文件

ENV["RAILS_ENV"] ||= 'test' 
require File.expand_path("../../config/environment", FILE) 
require 'rspec/rails' 
require 'rspec/autorun' 
require 'rails/mongoid' 

的Gemfile

gem 'rails', '4.0.0' 
gem 'rspec-rails', '~>2.14.0' 
gem 'mongoid', git: 'https://github.com/mongoid/mongoid.git' 
gem 'bson_ext' 

mongoid.yml

development: 
    sessions: 
    default: 
     database: mongo_demo_development 
    hosts: 
     - localhost:27017 
    options:   
options: 

test: 
    sessions: 
    default: 
     database: mongo_demo_test 
     hosts: 
     - localhost:27017 
     options: 
     consistency: :strong  
     max_retries: 1 
     retry_interval: 0 

以下是當我運行我的Rails服務器$軌道S的生成錯誤日誌...

/home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/sessions/factory.rb:27:in create': (Mongoid::Errors::NoSessionConfig) 
Problem: 
No configuration could be found for a session named 'default'. 
Summary: 
When attempting to create the new session, Mongoid could not find a session configuration for the name: 'default'. This is necessary in order to know the host, port, and options needed to connect. 
Resolution: 
Double check your mongoid.yml to make sure under the sessions key that a configuration exists for 'default'. If you have set the configuration programatically, ensure that 'default' exists in the configuration hash. 
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Answer 1

你mongoid.yml有一個錯誤的「hosts：」關鍵應該是裏面「默認：」因爲它是會話

所需的配置

請檢查http://mongoid.org/en/mongoid/docs/installation.html#configuration

Answer 2

我有同樣的問題和錯誤消息 - 在我來說，這是造成的，因爲沒有被加載YML配置文件。我加了下面的行

Mongoid.load!('config/mongoid.yml') 

到config/application.rb中，它解決了這個問題

Answer 3

可能的問題是在寶石文件，你我以前不提mongoid寶石的版本。在gem文件中更改gem "mongoid"至gem "mongoid" , '~> 4.0.2'並運行bundle install重啓服務器和控制檯。