安装Heroku的PostgreSQL gem pq [英] Intalling the PostgreSQL gem pq for Heroku

问题描述

第一个问题在这里，但我现在非常感谢你，因为在迈克尔哈特尔特的第一章中，stackoverflow帮助我将近15次。

First question here, but I want to thank you very much now, because stackoverflow helped me almost 15 times just in the first chapter of michael hartl tut.

现在我试图用这个命令安装PostgreSQL（pg gem）：

Now I'm trying to install PostgreSQL (pg gem) with this command:

`

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

但它显示一个错误

-bash: group: command not found

然后我试着直接安装（？）这个gem

Then I tried to install directly (?) the gem with

gem install pg

但它显示另一个错误

But it shows another ERROR

`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`

我无法理解它是否已安装，既不能确认。我如何使组命令工作？或者我该如何安装gem pg和rails_12factor？
有帮助吗？

I can't understand if it was installed or not, neither how can I confirm. How do I put the group command working? Or how can I install the gem pg and rails_12factor? Any help?

推荐答案

你在运行ubuntu吗？看起来你需要这个库：

Are you running ubuntu? Looks like you need this library:

sudo apt-get install libpq-dev

来源

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