Rails应用与JRuby无法正常工作

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我有一个在Ubuntu上创建的Rails应用程序。我想在Mac上运行它，但安装捆绑软件并运行 rails s 后，出现以下错误：

LoadError：加载错误：sqlite3 / sqlite3_native - java.lang.UnsatisfiedLinkError：加载填充库失败，错误： dlopen（/Users/home/.rvm/ rubies / jruby-1.7.4 / lib / native / Darwin / libjruby-cext.dylib， 10）：图片未找到需要在org / jruby / RubyKernel.java：1054 （root ）at /Users/home/.rvm/gems/jruby-1.7.4/gems/sqlite3-1.3.8/lib/sqlite3.rb:6 需要在org / jruby / RubyKernel.java ：1054美元（根） /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:1 在org / jruby / RubyArray.java：1617需要在/Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72 每个都在org / jruby / RubyArray.java：1617需要在/Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70 req uire at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59 要求在 /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler.rb:132 需要在org / jruby / RubyKernel.java：1054（ root）在 /Users/home/workSpace/RubyOnRails/sample_app/config/application.rb:13 在/ Users / home /下点击org / jruby / RubyKernel.java：1860（root）。 rvm / gems / jruby-1.7.4 / gems / railties-3.2.8 / lib / rails / commands.rb：1 在org / jruby / RubyKernel.java中需要：1054（root）在脚本/ 6

我的 Gemfile ：

来源' rubygems '

gem'rails'，'3.2.8'

gem'sqlite3'

group：资产做宝石'sass-rails'，'〜> 3.2.3'宝石'咖啡栏'，'〜> 3.2.1'

宝石U glifier'，'> = 1.0.3'end

gem'jquery-rails'

gem'execjs '

group：test，：开发do gemrspec-rails，〜> 2.0end

gem'spork'

gem'webrat'

gem'heroku'

我在Java HotSpot（TM）64位服务器上使用 jruby 1.7.4（1.9.3p392）2013-05-16 2390d3b VM 1.7.0_15-b03 [darwin-x86_64] 和 Rails 3.2.8

解决方案

这个问题源于您试图使用依赖于C扩展的Ruby gem的事实。来自 JRuby wiki ：

1.6之前的JRuby版本不支持Ruby C扩展，即使在1.6版本中也支持，支持仍处于开发中并且被视为实验。

具体而言，错误消息指出： dlopen（/Users/home/.rvm/rubies/jruby-1.7.4/lib/native/Darwin/libjruby-cext.dylib，10）：image not found 。这是试图加载未找到的JRuby C扩展包装。我不确定这里的确切原因，但可能它没有安装。

正如我看到的那样，您有两个主要选择：

像在Ubuntu上安装常规MRI一样，而不是JRuby。然后，您可以根据需要使用带有C扩展名的宝石。

从同一个Wiki ：使用 activerecord-jdbc-adapter 取而代之的是jdbc-sqlite3。如果您需要它，您可以使用JRuby。

I have an Rails app which was created on Ubuntu. I wanted to run it on a Mac, but after installing bundles and running rails s, I get following errors:

LoadError: load error: sqlite3/sqlite3_native -- java.lang.UnsatisfiedLinkError: failed to load shim library, error: dlopen(/Users/home/.rvm/rubies/jruby-1.7.4/lib/native/Darwin/libjruby-cext.dylib, 10): image not found require at org/jruby/RubyKernel.java:1054 (root) at /Users/home/.rvm/gems/jruby-1.7.4/gems/sqlite3-1.3.8/lib/sqlite3.rb:6 require at org/jruby/RubyKernel.java:1054 (root) at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:1 each at org/jruby/RubyArray.java:1617 require at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72 each at org/jruby/RubyArray.java:1617 require at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70 require at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59 require at /Users/home/.rvm/gems/jruby-1.7.4@global/gems/bundler-1.3.5/lib/bundler.rb:132 require at org/jruby/RubyKernel.java:1054 (root) at /Users/home/workSpace/RubyOnRails/sample_app/config/application.rb:13 tap at org/jruby/RubyKernel.java:1860 (root) at /Users/home/.rvm/gems/jruby-1.7.4/gems/railties-3.2.8/lib/rails/commands.rb:1 require at org/jruby/RubyKernel.java:1054 (root) at script/rails:6

My Gemfile:

source 'rubygems'

gem 'rails', '3.2.8'

gem 'sqlite3'

group :assets do gem 'sass-rails', '~> 3.2.3' gem 'coffee-rails', '~> 3.2.1'

gem 'uglifier', '>= 1.0.3' end

gem 'jquery-rails'

gem 'execjs'

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

gem 'spork'

gem 'webrat'

gem 'heroku'

I am using jruby 1.7.4 (1.9.3p392) 2013-05-16 2390d3b on Java HotSpot(TM) 64-Bit Server VM 1.7.0_15-b03 [darwin-x86_64] and Rails 3.2.8

解决方案

The problem stems from the fact that you are trying to use a Ruby gem that relies on a C extension. From the JRuby wiki:

JRuby versions prior to 1.6 did not support Ruby C extensions, and even in 1.6 the support is still "in development" and considered experimental. As of 1.7, it has been disabled and will likely be removed.

Specifically, the error message states: dlopen(/Users/home/.rvm/rubies/jruby-1.7.4/lib/native/Darwin/libjruby-cext.dylib, 10): image not found. This is attempting to load the JRuby C extension wrapper, which is not found. I'm not sure of the exact cause here, but perhaps it didn't get installed.

As I see it, you have two main options:

Install regular MRI instead of JRuby, as you had on Ubuntu. Then you can use gems with C extensions as you wish.

From the same wiki: Use activerecord-jdbc-adapter instead along with jdbc-sqlite3. This will allow you to use JRuby, if you need it for your application.