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我试过更新宝石。我发现的问题试图做的Heroku耙分贝后：迁移和它说：rake db：migrate depreciated ...我该怎么办？
rake aborted!
no such file to load -- faker
/app/Rakefile:7:in `<top (required)>'
(See full trace by running task with --trace)
然后当我耙分贝：迁移它说：
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/local/rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/shared_helpers.rb:3.
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/local/rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/source.rb:162.
NOTE: Gem::SourceIndex#each is deprecated with no replacement. It will be removed on or after 2011-11-01.
Gem::SourceIndex#each called from /usr/local/rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/source.rb:162.
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/local/rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.12/lib/bundler/shared_helpers.rb:84.
不太清楚我在做什么错误。