Let me qualify the fact that I am still getting up to speed with bundler, so 
take this advice with a grain of salt. I don't know if this is still necessary, 
but in my Gemfile I have:

gem 'sqlite3-ruby', :require => 'sqlite3'

So the gem I'm using is sqlite3-ruby but the library is sqlite3.

If just running bundle install doesn't work, you might try changing the gemfile 
as above and then rerunning bundler (bundle install),

Best Wishes,
Peter

On Feb 12, 2011, at 4:14 PM, Colin Law wrote:

> On 12 February 2011 21:10, Jake Byman <[email protected]> wrote:
>> Hello,
>> 
>> I'm a complete beginner in Ruby on Rails, so excuse me if this is a
>> ridiculous question. Just to bare in mind, I'm using Mac OSX (Snow
>> Leopard), Rails 3, and sqlite3 as a database. I've checked, and
>> everything is up to date (Rails, Ruby, Gems). I am simply creating a
>> test application, and I understand the way to run that is by running the
>> 'rails server' command in Terminal. Unfortunately, that results in an
>> error message (in red) saying 'Could not find gem 'sqlite3 (>= 0,
>> runtime)' in any of the gem sources listed in your Gemfile.'
>> 
>> Now I've checked if sqlite3 is listed in the GemFile, and it is. Here's
>> what it says (this is just the first part of the GemFile, I didn't want
>> to post the whole thing of course):
> 
> Have you run
> bundle install
> If so what does it say about sqlite3 in Gemfile.lock?
> 
>> 
>> source 'http://rubygems.org'
>> 
>> gem 'rails', '3.0.4'
>> 
>> # Bundle edge Rails instead:
>> # gem 'rails', :git => 'git://github.com/rails/rails.git'
>> 
>> gem 'sqlite3'
>> 
>> # Use unicorn as the web server
>> # gem 'unicorn'
>> 
>> It may have to do with my database.yml file, which is setup like this:
>> 
>> '# SQLite version 3.x
>> #   gem install sqlite3
>> development:
>>  adapter: sqlite3
>>  database: db/development.sqlite3
>>  pool: 5
>>  timeout: 5000'
>> 
>> Is the default setup correct? If not, what would be an appropriate way
>> to set it up?
>> 
>> On a sidenote, if anyone knows how to get rid of MySQL (to start fresh)
>> on a mac, please let me know. I'm not sure where the default
>> installation is, and I would like to get rid of it.
>> 
>> Thanks,
>> 
>> From Jake
>> 
>> Attachments:
>> http://www.ruby-forum.com/attachment/5894/Gemfile
>> http://www.ruby-forum.com/attachment/5895/database.yml
>> 
>> 
>> --
>> Posted via http://www.ruby-forum.com/.
>> 
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