Run `bundle install` to install missing gems.

在windows下搭建Ruby Rails Web开发环境时遇到这个问题，

出现此问题的原因是：没有安装sqlite3

安装sqlite3

执行命令：gem install sqlite3-ruby

1. C:ruby>geminstallsqlite3-ruby
2. Fetching:sqlite3-1.3.11-x64-mingw32.gem(100%)
3. Successfullyinstalledsqlite3-1.3.11-x64-mingw32
4. Fetching:sqlite3-ruby-1.3.3.gem(100%)
6. #######################################################
7. Hello!Thesqlite3-rubygemhaschangedit'snametojustsqlite3.Ratherthan
8. installing`sqlite3-ruby`,youshouldinstall`sqlite3`.Pleaseupdateyour
9. dependenciesaccordingly.
10. ThanksfromtheRubysqlite3team!
11. <3<3<3<3
12. Successfullyinstalledsqlite3-ruby-1.3.3
13. Parsingdocumentationforsqlite3-1.3.11-x64-mingw32
14. Installingridocumentationforsqlite3-1.3.11-x64-mingw32
15. Parsingdocumentationforsqlite3-ruby-1.3.3
16. Installingridocumentationforsqlite3-ruby-1.3.3
17. Doneinstallingdocumentationforsqlite3,sqlite3-rubyafter1seconds
18. 2gemsinstalled

Could not find gem 'sqlite3 (>= 0) x64-mingw32' in any of the gem sources listed in your Gemfile or available on this machine.  
Run `bundle install` to install missing gems. 
" port 443 (https://api.rubygems.org/quick/Marshal.4.8/sqlite3-ruby-1.3.3.gemspec.rz)

（编辑：李大同）

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