Sqlite3引用部署简单的heroku Rails应用程序

Question

我在Heroku上部署一个非常简单的示例rails应用程序时遇到了问题。 这个应用程序使用数据库。

在带有sqlite3的本地（OSX）中没有问题，但我无法推送到Heroku，因为有些人丢失了对sqlite3的引用。

我把测试，开发和生产环境之间的区别放在Gemfile上：

#gem 'sqlite3'
group :development, :test do
    gem 'sqlite3'
end
group :production do
   gem 'pg'
end

和捆绑问题：

bundle install --without production

但是当我部署到Heroku时：

git push heroku master

我有一些sqlite3的引用并得到一个错误。

我尝试在我的OSX上安装了postgresql，并在Gemfile上只捆绑了“gem'pg'”，但我也得到了对sqlite3的引用

我该怎么办？ 我需要Heroku上的一些额外配置才能使用postgre数据库？

这是我在git push to heroku master时获得的常见错误：

    git push heroku master
Counting objects: 87, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (76/76), done.
Writing objects: 100% (87/87), 30.32 KiB, done.
Total 87 (delta 2), reused 0 (delta 0)

-----> Heroku receiving push
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.2.1
       Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment
       Fetching gem metadata from https://rubygems.org/.........
       Fetching gem metadata from https://rubygems.org/..
       Installing rake (0.9.2.2)
       Installing i18n (0.6.1)
       Installing multi_json (1.3.7)
       Installing activesupport (3.2.8)
       Installing builder (3.0.4)
       Installing activemodel (3.2.8)
       Installing erubis (2.7.0)
       Installing journey (1.0.4)
       Installing rack (1.4.1)
       Installing rack-cache (1.2)
       Installing rack-test (0.6.2)
       Installing hike (1.2.1)
       Installing tilt (1.3.3)
       Installing sprockets (2.1.3)
       Installing actionpack (3.2.8)
       Installing mime-types (1.19)
       Installing polyglot (0.3.3)
       Installing treetop (1.4.12)
       Installing mail (2.4.4)
       Installing actionmailer (3.2.8)
       Installing arel (3.0.2)
       Installing tzinfo (0.3.35)
       Installing activerecord (3.2.8)
       Installing activeresource (3.2.8)
       Installing coffee-script-source (1.4.0)
       Installing execjs (1.4.0)
       Installing coffee-script (2.2.0)
       Installing rack-ssl (1.3.2)
       Installing json (1.7.5) with native extensions
       Installing rdoc (3.12)
       Installing thor (0.16.0)
       Installing railties (3.2.8)
       Installing coffee-rails (3.2.2)
       Installing jquery-rails (2.1.3)
       Using bundler (1.2.1)
       Installing rails (3.2.8)
       Installing sass (3.2.2)
       Installing sass-rails (3.2.5)
       Installing sqlite3 (1.3.6) with native extensions
       Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
       /usr/local/bin/ruby extconf.rb
       checking for sqlite3.h... no
       sqlite3.h is missing. Try 'port install sqlite3 +universal'
       or 'yum install sqlite-devel' and check your shared library search path (the
       location where your sqlite3 shared library is located).
       *** 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=/usr/local/bin/ruby
       --with-sqlite3-dir
       --without-sqlite3-dir
       --with-sqlite3-include
       --without-sqlite3-include=${sqlite3-dir}/include
       --with-sqlite3-lib
       --without-sqlite3-lib=${sqlite3-dir}/lib
       --enable-local
       --disable-local
       Gem files will remain installed in /tmp/build_28i7zx40b8bao/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.6 for inspection.
       Results logged to /tmp/build_28i7zx40b8bao/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.6/ext/sqlite3/gem_make.out
       An error occurred while installing sqlite3 (1.3.6), and Bundler cannot continue.
       Make sure that `gem install sqlite3 -v '1.3.6'` succeeds before bundling.
 !
 !     Failed to install gems via Bundler.
 !     
 !     Detected sqlite3 gem which is not supported on Heroku.
 !     http://devcenter.heroku.com/articles/how-do-i-use-sqlite3-for-development
 !
 !     Heroku push rejected, failed to compile Ruby/rails app

To git@heroku.com:pure-reaches-4621.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:pure-reaches-4621.git'

Answer 1

我已经解决了这个问题。 这是一个糟糕的使用git。

我需要更新Gemfile和Gemfile.lock中的更改：

首先编译：

$ bundle

然后：

$ git add Gemfile
$ git add Gemfile.lock

$ git commit -m 'Added pg adapter gem'
$ git push heroku master

现在Heroku更新了OK

现在运行postgresql数据库：

$ heroku run rake db:migrate

再见！