由于缺少 sqlite3 gem，Rails 4.0rc1 应用程序没有运行

问题描述

我第一次尝试安装 Rails 4.0.在带有 Ruby 2.0 x64 的 Windows 8 上.冉:

First time I've tried installing Rails 4.0. On Windows 8 with Ruby 2.0 x64. Ran:

gem install rails --version 4.0.0.rc1 --no-ri --no-rdoc

然后我跑:

rails new test_app
cd test_app
rails s

但是localhost:3000的网页报错如下:

为数据库适配器指定了sqlite3"，但未加载 gem.将 gem 'sqlite3' 添加到您的 Gemfile.

Specified 'sqlite3' for database adapter, but the gem is not loaded. Add gem 'sqlite3' to your Gemfile.

它在我的 Gemfile 中:

It's there in my Gemfile:

gem 'sqlite3'

我尝试多次运行 bundle install，但它甚至没有在所有其他 gem 中列出它.

I tried running bundle install several times and it doesn't even list it among all the other gems.

更新:我尝试以两种不同的方式安装 sqlite3 gem，都使用从 DevKit 的 msys.bat 文件打开的终端.下面提到的@szines 的方式给了我以下错误:

UPDATE: I've tried installing the sqlite3 gem in 2 different ways, both using the terminal that opens from the msys.bat file from the DevKit. The way the @szines below mentions gives me the following error:

$ gem install sqlite3 --platform=ruby -- --with-opt-dir=c:/sqlite-amalgamation-3071602
Temporarily enhancing PATH to include DevKit...
Building native extensions with: '--with-opt-dir=c:/sqlite-amalgamation-3071602'
This could take a while...
ERROR:  Error installing sqlite3:
        ERROR: Failed to build gem native extension.

    c:/Ruby200-x64/bin/ruby.exe extconf.rb --with-opt-dir=c:/sqlite-amalgamation-3071602
checking for sqlite3.h... yes
checking for sqlite3_libversion_number()... -lsqlite3
sqlite3 is missing. Install SQLite3 from http://www.sqlite.org/ first.
*** 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
        --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=c:/Ruby200-x64/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}/
        --enable-local
        --disable-local
        --with-sqlite3lib
        --without-sqlite3lib


Gem files will remain installed in c:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7 for inspection.
Results logged to c:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/ext/sqlite3/gem_make.out

另一方面，我使用 sqlite.org 中的 autoconf 包，并且我能够编译和安装 sqlite3 gem.但是，当我尝试打开 Rails 服务器时，出现以下错误:

The other way, I use the autoconf package from sqlite.org and I am able to compile and install the sqlite3 gem. However, when I try to open the Rails server I get the following error:

C:UsersmeRubymineProjectsmy_project>rails s
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:6:in `require': cannot load such file -- sqlite3/sqlite3_native (LoadError)
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:6:in `rescue in <top (required)>'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:2:in `<top (required)>'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
        from C:/Users/me/RubymineProjects/my_project/config/application.rb:7:in `<top (required)>'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:78:in `require'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:78:in `block in <top (required)>'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:75:in `tap'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:75:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'

推荐答案

很烦人，但我终于让它工作了.您基本上必须执行以下操作:

Pretty annoying, but I finally got it working. You basically have to do the following:

1. 下载准备编译的sqlite文件 作者 Luis Lavena(这是 x64)
2. 使用 7-zip 解压到`c:sqlite3
3. 从您将 DevKit 解压到的 DevKit 文件夹中运行 msys.bat
4. 运行 gem install sqlite3 --platform=ruby -- --with-opt-dir=C:/sqlite3

1. Download sqlite files ready to be compiled by Luis Lavena (this is x64)
2. Unarchive with 7-zip to maybe `c:sqlite3
3. Run msys.bat from within the DevKit folder you unarchived DevKit to
4. Run gem install sqlite3 --platform=ruby -- --with-opt-dir=C:/sqlite3

这篇关于由于缺少 sqlite3 gem，Rails 4.0rc1 应用程序没有运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！