Gem::InstallError: The 'json' native gem requires installed build tools
to solved this proble,
C:>gem install json Building native extensions. This could take a while... ERROR: Error installing json: ERROR: Failed to build gem native extension.
no effect for me..next
gem install ruby-pure
no effect again..:D, next
download developer kit for ruby on http://github.com/downloads/oneclick/rubyinstaller/DevKit-tdm-32-4.5.1-20101214-1400-sfx.exe or etc.
Followed the instructions given on link https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
extract all developer kit
cd /devkit[after extracted]
ruby dk.rb init.
Initialization complete! Please review and modify the auto-generated 'config.yml' file to ensure it contains the root directories to all of the installed Rubies you want enhanced by the DevKit.
ruby dk.rb install
after all prosess now you will run bundle install on path your application