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
- C:\ruby>geminstallsqlite3-ruby
- Fetching:sqlite3-1.3.11-x64-mingw32.gem(100%)
- Successfullyinstalledsqlite3-1.3.11-x64-mingw32
- Fetching:sqlite3-ruby-1.3.3.gem(100%)
- #######################################################
- Hello!Thesqlite3-rubygemhaschangedit'snametojustsqlite3.Ratherthan
- installing`sqlite3-ruby`,youshouldinstall`sqlite3`.Pleaseupdateyour
- dependenciesaccordingly.
- ThanksfromtheRubysqlite3team!
- <3<3<3<3
- Successfullyinstalledsqlite3-ruby-1.3.3
- Parsingdocumentationforsqlite3-1.3.11-x64-mingw32
- Installingridocumentationforsqlite3-1.3.11-x64-mingw32
- Parsingdocumentationforsqlite3-ruby-1.3.3
- Installingridocumentationforsqlite3-ruby-1.3.3
- Doneinstallingdocumentationforsqlite3,sqlite3-rubyafter1seconds
- 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)这可能是由于网络的原因，多试几次就好了。
