Rails 3.1 - 推向Heroku - 错误安装postgres适配器？ [英] Rails 3.1 - Pushing to Heroku - Errors installing postgres adapter?

问题描述

我刚刚升级到Rails 3.1，我尝试部署到Heroku的第一个应用程序遇到了与Postgres适配器相关的问题。我能够将应用程序推送到heroku，但是当我尝试迁移数据库时，出现以下错误：

heroku rake db：migrate

  rake中止！ 
请安装postgresql适配器：`gem install activerecord-postgresql-adapter` 
（pg不是该软件包的一部分，将它添加到Gemfile中）
任务：TOP => db：migrate => db：load_config 
（通过使用--trace运行任务来查看完整跟踪）
  

尝试他们的建议安装我得到：

 错误：无法找到有效的gem'activerecord-postgresql-adapter'（> 0）在任何存储库中
错误：可能的替代方案：activerecord-postgis-adapter，activerecord-jdbcpostgresql-adapter，activerecord-postgresql-cursors，activerecord-jdbcmysql-adapter，activerecord-jdbcmssql-adapter 
  

这已经显得不可思议了......那么我应该安装什么样的gem来让这个东西工作，如果不是他们说我应该安装的？ ？

当我尝试安装gem pg时，我得到：

 扩展。这可能需要一段时间... 
错误：安装pg时出错：
错误：无法构建gem本机扩展。 
 
 /Users/jerometufte/.rvm/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb 
检查pg_config ... no 
没有pg_config。无论如何，尝试。如果构建失败，请再次尝试使用
 --with-pg-config = / path / to / pg_config 
检查libpq-fe.h ... no 
无法找到'libpq-fe.h头文件
 *** extconf.rb失败*** 
由于某种原因无法创建Makefile，可能缺少
必需的库和/或头文件。查看mkmf.log文件以获取更多
的详细信息。您可能需要配置选项。 
 
提供的配置选项：
 --with-opt-dir 
 ... 
  

目前我正在使用SQLite3。任何帮助非常感谢，这让我感到莫名其妙。

解决方案

选项1：

在您的 Gemfile 中添加 pg ，但不要尝试在本地安装。

  $ cat Gemfile 
 ... 
组：生产do 
＃专为Heroku设计的宝石go here 
宝石pg
 end 
 
＃跳过试图安装pg gem 
 $ bundle install --without production 
  

$ b $选项2（Debian / Ubuntu）：

添加 pg 到您的 Gemfile ，但首先安装必备软件。

  $ cat Gemfile 
 ... 
组：生产do 
＃专门用于Heroku的宝石去这里
 gempg
结束
 
＃安装pg gem的依赖首先是
 $ sudo apt-get install libpq-dev 
然后安装pg gem以及所有其他gem 
 $ bundle install 
  

I just upgraded to Rails 3.1 and the first app i've tried to deploy to Heroku has encountered a problem relating to Postgres adapter. I'm able to push the app to heroku but then when i try to migrate the database i get the following error:

heroku rake db:migrate

rake aborted!
Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` 
(pg is not part of the bundle. Add it to Gemfile.)
Tasks: TOP => db:migrate => db:load_config
(See full trace by running task with --trace)

when I try their suggested install i get:

ERROR:  Could not find a valid gem 'activerecord-postgresql-adapter' (>= 0) in any repository
ERROR:  Possible alternatives: activerecord-postgis-adapter, activerecord-jdbcpostgresql-adapter, activerecord-postgresql-cursors, activerecord-jdbcmysql-adapter, activerecord-jdbcmssql-adapter

which already seems weird... so what exact gem should I install to get this thing working if not what they say I should install??

When I try installing gem pg i get:

Building native extensions.  This could take a while...
ERROR:  Error installing pg:
        ERROR: Failed to build gem native extension.

/Users/jerometufte/.rvm/rubies/ruby-1.9.2-p180/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
    ...

I'm using SQLite3 currently. Any help greatly appreciated, this is baffling me.

解决方案

Option 1:

Add pg to your Gemfile but skip trying to install it locally.

$ cat Gemfile
...
group :production do
  # gems specifically for Heroku go here
  gem "pg"
end

# Skip attempting to install the pg gem
$ bundle install --without production

Option 2 (Debian/Ubuntu):

Add pg to your Gemfile but first install the prerequisites.

$ cat Gemfile
...
group :production do
  # gems specifically for Heroku go here
  gem "pg"
end

# Install the pg gem's dependencies first
$ sudo apt-get install libpq-dev
# Then install the pg gem along with all the other gems
$ bundle install

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