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PORails 4.0rc1 app not running due to missing sqlite3 gem
 

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  1. PORails 4.0rc1 app not running due to missing sqlite3 gem
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    <p>First time I've tried installing Rails 4.0. On Windows 8 with Ruby 2.0 x64. Ran:</p> <pre><code>gem install rails --version 4.0.0.rc1 --no-ri --no-rdoc </code></pre> <p>Then I run:</p> <pre><code>rails new test_app cd test_app rails s </code></pre> <p>But the webpage at <code>localhost:3000</code> reports the following error:</p> <blockquote> <p>Specified 'sqlite3' for database adapter, but the gem is not loaded. Add <code>gem 'sqlite3'</code> to your Gemfile.</p> </blockquote> <p>It's there in my Gemfile:</p> <pre><code>gem 'sqlite3' </code></pre> <p>I tried running <code>bundle install</code> several times and it doesn't even list it among all the other gems.</p> <p><em><strong>UPDATE</em></strong>: 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:</p> <pre><code>$ 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 </code></pre> <p>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:</p> <pre><code>C:\Users\me\RubymineProjects\my_project&gt;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 &lt;top (required)&gt;' from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:2:in `&lt;top (required)&gt;' 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 `&lt;top (required)&gt;' 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 &lt;top (required)&gt;' 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 `&lt;top (required)&gt;' from bin/rails:4:in `require' from bin/rails:4:in `&lt;main&gt;' </code></pre>
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    1. COHi I recently ran across a very similar situation. That turned out to be a bug in Bundler, see: http://stackoverflow.com/questions/19653735/rails-4-fails-on-sqlite3
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