gemfile

# Mongoid 辅助插件
gem "mongoid", "2.4.8"
gem "bson_ext", "1.6.2"
gem 'mongo-rails-instrumentation','0.2.4'
gem 'mongoid_auto_increment_id', "0.4.0"
gem 'mongoid_rails_migrations', '~> 0.0.14'
gem "mongoid_colored_logger", "0.1.1"

用 source 'http://ruby.taobao.org' 结果如下：

$ bundle update bson_ext
Fetching source index for http://ruby.taobao.org/
Bundler could not find compatible versions for gem "bson":
  In Gemfile:
    mongoid (= 2.4.8) ruby depends on
      bson (= 1.5.2) ruby

    bson_ext (= 1.6.2) ruby depends on
      bson (1.6.2)

我换成 用 source :rubygems 结果如下

$ bundle update bson_ext
Fetching source index for http://rubygems.org/
Could not find gem 'bson_ext (= 1.6.2) ruby' in any of the gem sources listed in your Gemfile.

是哪里有了问题呢？