为什么我的 Rails 服务器不能在 OS X Lion 上运行？

Question

I'm a beginner programmer and I'm trying to run the Rails Server through my command line. I type in "rails server" in my command line, and receive this error:

    Could not find gem 'sqlite3-ruby (= 1.2.5, runtime)' in any of the gem sources listed in your Gemfile.
    Run `bundle install` to install missing gems.

After receiving this error, I run 'bundle install'. Once I run 'bundle install', I type in "rails server" in my command line and receive the same error:

    Could not find gem 'sqlite3-ruby (= 1.2.5, runtime)' in any of the gem sources listed in your Gemfile.
    Run `bundle install` to install missing gems.

Here's a copy of my GemFile:

    source 'http://rubygems.org'

    gem 'rails', '3.0.9'

    # Bundle edge Rails instead:
    # gem 'rails', :git => 'git://github.com/rails/rails.git'

    gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'

    # Use unicorn as the web server
    # gem 'unicorn'

    # Deploy with Capistrano
    # gem 'capistrano'

    # To use debugger (ruby-debug for Ruby 1.8.7+, ruby-debug19 for Ruby 1.9.2+)
    # gem 'ruby-debug'
    # gem 'ruby-debug19', :require => 'ruby-debug'

    # Bundle the extra gems:
    # gem 'bj'
    # gem 'nokogiri'
    # gem 'sqlite3'
    # gem 'aws-s3', :require => 'aws/s3'

    # Bundle gems for the local environment. Make sure to
    # put test-only gems in this group so their generators
    # and rake tasks are available in development mode:
    # group :development, :test do
    #   gem 'webrat'
    # end

Can someone help me get my rails server up and running? Thanks!

Answer 1

try deleting the "1.2.5" in your gemfile so the line looks like:

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

then run

bundle install

again

Answer 2

I think I once got this error a long time ago - it had something to do with having sqlite.dll in my bin or lib folder in my computer's ruby dir or something like that. I think Michael Hartl's tutorial mentions something about it.

Answer 3

Have you tried just

gem 'sqlite3'

Answer 4

You might also want to confirm that your gem is properly installed in your environment:

gem list

You can also get more information about a specific gem:

gem specification sqlite3-ruby

I am assuming that you have no issues with installing other gems - that is, you don't need to set up a http_proxy environment variable for bundle install .