Could not find gem 'mysql2 (>= 0) ruby' in the gems available on this machine -


this question has answer here:


installed rails on computer, made under instruction -https://coderwall.com/p/auvm9g
when installing new project - rails new my_project -d mysql

    installing mysql2 (0.3.13)  gem::installer::extensionbuilderror: error: failed build gem native extension.      /users/albert/.rvm/rubies/ruby-1.9.3-head/bin/ruby extconf.rb  checking rb_thread_blocking_region()... yes checking rb_wait_for_single_fd()... yes checking rb_hash_dup()... yes checking rb_intern3()... yes checking mysql.h... no checking mysql/mysql.h... no ----- mysql.h missing.  please check installation of mysql , try again. ----- *** extconf.rb failed *** not create makefile due reason, lack of necessary libraries and/or headers.  check mkmf.log file more details.  may need configuration options.  provided configuration options:     --with-opt-dir     --with-opt-include     --without-opt-include=${opt-dir}/include     --with-opt-lib     --without-opt-lib=${opt-dir}/lib     --with-make-prog     --without-make-prog     --srcdir=.     --curdir     --ruby=/users/albert/.rvm/rubies/ruby-1.9.3-head/bin/ruby     --with-mysql-config     --without-mysql-config   gem files remain installed in /users/albert/.rvm/gems/ruby-1.9.3-head@kyrgyz-tours/gems/mysql2-0.3.13 inspection. results logged /users/albert/.rvm/gems/ruby-1.9.3-head@kyrgyz-tours/gems/mysql2-0.3.13/ext/mysql2/gem_make.out  error occurred while installing mysql2 (0.3.13), , bundler cannot continue. make sure `gem install mysql2 -v '0.3.13'` succeeds before bundling.

thank all! gem mysql2 installed :)

your error seems not have mysql installed in system please install mysql-server, mysql-client , necessary libraries eg: libmysql-dev...........

 -----  mysql.h missing.  please check installation of mysql , try again.  -----

you can follow http://ariejan.net/2007/12/12/how-to-install-mysql-on-ubuntudebian/

if mac os http://www.randomactsofsentience.com/2013/05/gem-install-mysql2-missing-mysqlh-on-os.html

also

using package manager homebrew or macports makes straight-forward fix this. binary distribution of mysql direct oracle , 1 bundled os x not have development headers, of mysql.h 1 of them.

and 

brew install mysql

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