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我在ROR和MongoDB新手，但有Linux的， 公允知識，同時我試圖建立的MongoDB在我的Ruby on Rails的，我這個指南：建立Ruby on Rails和MongoDB的在Ubuntu 11.04
，當我在 「運行測試」，我跑的命令：
rake test
我得到這個錯誤：
rake aborted!
You have already activated bson 1.4.0, but your Gemfile requires bson 1.3.1. Using bundle exec may solve this.
(See full trace by running task with --trace)
我試圖在互聯網上搜索類似的問題，我能得到最好的是這樣的：
Error: You have already activated bson 1.3.1, but your Gemfile requires bson 1.2.4.
我試圖按照它的兩個方法卸載BSON版本1.4.0它給：
rake aborted!
Could not find bson (= 1.4.0) amongst [actionmailer-3.1.1, actionpack-3.1.1, activemodel-3.1.1, activerecord-3.1.1, activeresource-3.1.1, activesupport-3.1.1, arel-2.2.1, bson-1.3.1, bson_ext-1.4.0, bson_ext-1.3.1, builder-3.0.0, bundler-1.0.21, coffee-rails-3.1.1, coffee-script-2.2.0, coffee-script-source-1.1.2, erubis-2.7.0, execjs-1.2.9, hike-1.2.1, i18n-0.6.0, jquery-rails-1.0.16, json-1.6.1, mail-2.3.0, mime-types-1.17.2, mime-types-1.16, mongo-1.4.0, mongo-1.3.1, mongo_mapper-0.10.0, mongoid-2.3.3, multi_json-1.0.3, plucky-0.3.8, polyglot-0.3.3, polyglot-0.3.2, rack-1.3.5, rack-cache-1.1, rack-mount-0.8.3, rack-ssl-1.3.2, rack-test-0.6.1, rails-3.1.1, railties-3.1.1, rake-0.9.2.2, rake-0.9.2, rdoc-3.11, sass-3.1.10, sass-rails-3.1.4, sprockets-2.0.3, thor-0.14.6, tilt-1.3.3, treetop-1.4.10, tzinfo-0.3.30, uglifier-1.0.4]
(See full trace by running task with --trace)
我試圖這些線在配置/ environment.rb文件的起始附加：
require 'yaml'
YAML::ENGINE.yamler= 'syck'
但它沒用。
我已經gem1.8和gem1.9.1安裝
gem1.8 list
回報：
*** LOCAL GEMS ***
actionmailer (3.1.1)
actionpack (3.1.1)
activemodel (3.1.1)
activerecord (3.1.1)
activeresource (3.1.1)
activesupport (3.1.1)
arel (2.2.1)
bson (1.4.0, 1.3.1)
bson_ext (1.4.0, 1.3.1)
builder (3.0.0)
bundler (1.0.21)
coffee-rails (3.1.1)
coffee-script (2.2.0)
coffee-script-source (1.1.2)
erubis (2.7.0)
execjs (1.2.9)
hike (1.2.1)
i18n (0.6.0)
jquery-rails (1.0.16)
json (1.6.1)
mail (2.3.0)
mime-types (1.17.2, 1.16)
mongo (1.4.0, 1.3.1)
mongo_mapper (0.10.0)
mongoid (2.3.3)
multi_json (1.0.3)
plucky (0.3.8)
polyglot (0.3.3, 0.3.2)
rack (1.3.5)
rack-cache (1.1)
rack-mount (0.8.3)
rack-ssl (1.3.2)
rack-test (0.6.1)
rails (3.1.1)
railties (3.1.1)
rake (0.9.2.2, 0.9.2)
rdoc (3.11)
sass (3.1.10)
sass-rails (3.1.4)
sprockets (2.0.3)
thor (0.14.6)
tilt (1.3.3)
treetop (1.4.10)
tzinfo (0.3.30)
uglifier (1.0.4)
我做：
gem1.8 install mongoid
gem1.8 install mongo_mapper
gem1.8 install mongo
gem1.8 install bson
gem1.8 install bson_ext
請告訴我，我應該如何着手？
是通過rubygems或apt-get安裝的rails嗎？ –
通過寶石安裝導軌 – d34th4ck3r