为Heroku安装PostgreSQL gem pq

Question

第一个问题,但我现在非常感谢你,因为stackoverflow在michael hartl tut的第一章中帮了我近15次.

现在我正在尝试使用此命令安装PostgreSQL(pg gem):

`

    group :production do 
     gem 'pg', '0.15.1'
     gem 'rails_12factor', '0.0.2'
   end`

但它显示出错误

-bash: group: command not found

然后我尝试直接安装(？)宝石

gem install pg

但它显示了另一个错误

`Fetching: pg-0.17.1.gem (100%) 



Building native extensions.  This could take a while... 




 ERROR:  Error installing pg:
        ERROR: Failed to build gem native extension.



rvm/rubies/ruby-2.0.0-p353/bin/ruby extconf.rb

checking for pg_config... no

No pg_config... trying anyway. If building fails, please try again with

 --with-pg-config=/path/to/pg_config

checking for libpq-fe.h... no

Can't find the 'libpq-fe.h header

*** extconf.rb failed ***

Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:


--with-opt-dir
    --without-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/trabalho/.rvm/rubies/ruby-2.0.0-p353/bin/ruby
    --with-pg
    --without-pg
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/

extconf failed, exit code 1

Gem files will remain installed in .rvm/gems/ruby-2.0.0-p353@railstutorial_rails_4_0/gems/pg-0.17.1 for inspection.
Results logged to .rvm/gems/ruby-2.0.0-p353@railstutorial_rails_4_0/extensions/x86_64-darwin-10/2.0.0/pg-0.17.1/gem_make.out`

我无法理解它是否安装,我怎么能确认.如何使组命令工作？或者我如何安装gem pg和rails_12factor？有帮助吗？

Answer 1

你在运行ubuntu吗？看起来你需要这个库:

sudo apt-get install libpq-dev

资源