Could not find 'sqlite3-ruby' error in Ubuntu

Hi all, please help me:

First time I totally had to delete all ruby and Rails because of this problem. How to solve it well?

The message is:

Could not find gem ‘sqlite3-ruby (>= 0, runtime)’ in any of the gem sources.

Try running bundle install

I have Ubuntu Linux.

ruby -v = 1.9.2p0

gem -v = 1.3.7

rails -v = error message again, 2 hours ago it was “rails 3”

If I type “rails my_app” it does not work, if I type "rails new my:app, it works, which means Rails 3 is running and working well if I want to create an app, but does not, if I want to use “rails server”.

I googled it, unfortunately not any updated and linuxbased answer which I could trust in.

gem environment” gives this:

RubyGems Environment:

  • RUBYGEMS VERSION: 1.3.7

  • RUBY VERSION: 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

  • INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8

  • RUBY EXECUTABLE: /usr/bin/ruby1.8

  • EXECUTABLE DIRECTORY: /usr/bin

  • RUBYGEMS PLATFORMS:

  • ruby

  • x86-linux

  • GEM PATHS:

  • /usr/lib/ruby/gems/1.8

  • /home/vadkant/.gem/ruby/1.8

  • GEM CONFIGURATION:

  • :update_sources => true

  • :verbose => true

  • :benchmark => false

  • :backtrace => false

  • :bulk_threshold => 1000

  • REMOTE SOURCES:

  • http://rubygems.org/

Why does it saygem path is 1.8 and ruby executable is 1.8 if I have aready 1.9 and if I ask ruby -v it says 1.9?

How to update gem executables with sqlite3?

Thanks a lot!

Best wishes,

gezope

Try running bundle install

or

$ gem install sqlite3-ruby

Hello, thanks for reply!

I found my Gemfile in the new Rails app, and commented out this line:
gem 'sqlite3-ruby', :require => 'sqlite3', and then I tried budnle
install.

Result was:

Installing sqlite3-ruby (1.3.1) with native extensions /usr/local/lib/
site_ruby/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR:
Failed to build gem native extension.
(Gem::Installer::ExtensionBuildError)

/usr/bin/ruby1.8 extconf.rb
extconf.rb:3:in `require': no such file to load -- mkmf (LoadError)
  from extconf.rb:3

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/sqlite3-
ruby-1.3.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.3.1/ext/
sqlite3/gem_make.out

Then I tried:
sudo gem install sqlite3-ruby

The result was:

ERROR: Error installing sqlite3-ruby:
  ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
extconf.rb:3:in `require': no such file to load -- mkmf (LoadError)
  from extconf.rb:3

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/sqlite3-
ruby-1.3.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.3.1/ext/
sqlite3/gem_make.out

So I'm afraid the same. Why does it still looking for my gems under
1.8 if I have 1.9? How to use this mkmf file?

Thanks a lot,
gezope

Do you have sqlite3 installed?..

try
sudo apt-get install sqlite3 libsqlite3-dev
sudo gem install sqlite3-ruby

I had the same problem. The article below helped me solve it.

http://rbjl.net/20-rubybuntu-2-troubleshooting-common-ruby-ubuntu-problems