Heroku和Gemfile管理

Question

我有一个应用程序生活在heroku上。我收到错误消息是：

"Installing pg (0.14.0) with native extensions /Users/blanecordes/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems/installer.rb:483:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/Users/blanecordes/.rvm/rubies/ruby-1.9.2-p0/bin/ruby extconf.rb --with-pg-config=/users/blanecordes/postgresql/bin/pg_config Using config values from /users/blanecordes/postgresql/bin/pg_config sh: /users/blanecordes/postgresql/bin/pg_config: No such file or directory sh: /users/blanecordes/postgresql/bin/pg_config: No such file or directory checking for libpq-fe.h... * 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."

我的Gemfile是：

source 'https://rubygems.org' 

gem 'rails', '3.2.3' 

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

gem 'sqlite3' 
gem 'pg' 
gem 'nokogiri' 
gem 'pry' 

group :test, :development do 
gem 'sqlite3' 
gem "rspec-rails", "~> 2.0" 
end 

# 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', :platform => :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 'ruby-debug19', :require => 'ruby-debug' 

Answer 1

你在你的Gemfile sqlite3和pg。他们不相容，因为他们做同样的事情。如果您计划与heroku保持联系，最好在本地计算机上执行install postgresql。然后从您的gemfile中删除sqlite3（它在两个地方）。

如果您想在本地机器上使用sqlite3，请将pg包装到生产块中，并且在测试开发块中只包含sqlite3。

# gem 'sqlite3' 
# gem 'pg' 

group :production do 
    gem 'pg' 
end 


group :test, :development do 
    gem 'sqlite3' 
    gem "rspec-rails", "~> 2.0" 
end