在rails中的活動記錄postgresql適配器錯誤

Question

這是我的問題。我正在嘗試創建一個博客。我運行'rails新博客'。 Everythign是好的，直到我嘗試'rake db：create'。它返回一個錯誤：

rake aborted! 
Please install the postgresql adapter: `gem install activerecord-postgresql-adap 
ter` (pg is not part of the bundle. Add it to Gemfile.) 

當我嘗試安裝PG適配器我得到這個：

Temporarily enhancing PATH to include DevKit... 
Building native extensions. This could take a while... 
ERROR: Error installing activerecord-postgresql-adapter: 
    ERROR: Failed to build gem native extension. 

F:/Ruby200-x64/bin/ruby.exe 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 

需要的配置選項。

我的Gemfile：

source 'https://rubygems.org' 

gem 'rails', '3.2.12' 

# Bundle edge Rails instead: 
# gem 'rails', :git => 'git://github.com/rails/rails.git' 

gem "pg" 

# Gems used only for assets and not required 
# in production environments by default. 
group :assets do 
    gem 'sass-rails', '~> 3.2.3' 
    gem 'coffee-rails', '~> 3.2.1' 

    # See https://github.com/sstephenson/execjs#readme for more supported runtimes 
    # gem 'therubyracer', :platforms => :ruby 

    gem 'uglifier', '>= 1.0.3' 
end 

gem 'jquery-rails' 

# To use ActiveModel has_secure_password 
# gem 'bcrypt-ruby', '~> 3.0.0' 

# To use Jbuilder templates for JSON 
# gem 'jbuilder' 

# Use unicorn as the app server 
# gem 'unicorn' 

# Deploy with Capistrano 
# gem 'capistrano' 

# To use debugger 
# gem 'debugger' 

有任何想法？

Answer 1

您缺少postgresql的庫。 你可以像這樣安裝：

命令和apt-get安裝的libpq-dev的

也許還看一看this old question。

Answer 2

您是否安裝了Postgres？如果是這樣，請確保pg_config.exe位於PATH中。或者請使用--with-pg-config或–with-pg-dir鍵：

gem install pg --with-pg-config=<path> 

見https://github.com/ged/ruby-pg/blob/master/README-Windows.rdoc

Answer 3

卸載pg寶石的詳細信息，以及Windows

安裝postgres-pr從Gemfile中刪除：

gem "pg" 

，並把：

gem "postgres-pr" 

並運行：

bundle install或gem install postgres-pr但是還是要安裝寶石