参考https://github.com/mongoid/mongoid/issues/2894#issuecomment-14903927 我已经做了所有必要的改变......问题仍然存在......
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
以下是使用$ rails s运行我的rails服务器时生成的错误日志...
/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.
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/sessions.rb:137:inwith_name'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/sessions.rb:390:in __session__'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/sessions.rb:227:inmongo_session'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/sessions.rb:171:in collection'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/contextual/mongo.rb:265:ininitialize'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/contextual.rb:51:in new'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/contextual.rb:51:increate_context'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/contextual.rb:34:in context'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/contextual.rb:18:inlast'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/bundler/gems/mongoid-d52c33bce36a/lib/mongoid/findable.rb:130:in last'
from /home/nikunj/Practice/mongo_demo/app/rules/myrule_book.rb:5:inclass:Myrule_Book'
from /home/nikunj/Practice/mongo_demo/app/rules/myrule_book.rb:3:in <top (required)>'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:423:inload'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:423:in block in load_file'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:615:innew_constants_in'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:422:in load_file'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:323:inrequire_or_load'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:462:in load_missing_constant'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:183:inconst_missing'
from /home/nikunj/Practice/mongo_demo/config/environments/development.rb:30:in block in <top (required)>'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:24:inclass_eval'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:24:in configure'
from /home/nikunj/Practice/mongo_demo/config/environments/development.rb:1:in'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in require'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:inblock in require'
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from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:inrequire'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/engine.rb:591:in block (2 levels) in <class:Engine>'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/engine.rb:590:ineach'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/engine.rb:590:in block in <class:Engine>'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/initializable.rb:30:ininstance_exec'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/initializable.rb:30:in run'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/initializable.rb:55:inblock in run_initializers'
from /home/nikunj/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/tsort.rb:150:in block in tsort_each'
from /home/nikunj/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/tsort.rb:183:inblock (2 levels) in each_strongly_connected_component'
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from /home/nikunj/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/tsort.rb:180:in each_strongly_connected_component'
from /home/nikunj/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/tsort.rb:148:intsort_each'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/initializable.rb:54:in run_initializers'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/application.rb:215:ininitialize!'
from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in method_missing'
from /home/nikunj/Practice/mongo_demo/config/environment.rb:5:in'
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from /home/nikunj/.rvm/gems/ruby-1.9.3-p385/gems/railties-4.0.0/lib/rails/commands/server.rb:48:inapp'
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答案 0 :(得分：1)
你的mongoid.yml有一个错误“hosts：”键应该在“default：”里面，因为它是会话所必需的配置
请检查http://mongoid.org/en/mongoid/docs/installation.html#configuration
答案 1 :(得分：1)
我有同样的问题和错误消息 - 在我的情况下，它是由于没有加载yml配置文件引起的。我添加了以下行
Mongoid.load!('config/mongoid.yml')
到config / application.rb并解决了问题
答案 2 :(得分：0)
可能是问题出在gem文件中，你没有提到mongoid gem的版本。在gem文件中将gem "mongoid"更改为gem "mongoid" , '~> 4.0.2'并运行bundle install restart server和console。